（五十一）c#Winform自定义控件-文字提示-HZHControls

官网

http://www.hzhcontrols.com

前提

入行已经7,8年了，一直想做一套漂亮点的自定义控件，于是就有了本系列文章。

GitHub：https://github.com/kwwwvagaa/NetWinformControl

码云：https://gitee.com/kwwwvagaa/net_winform_custom_control.git

如果觉得写的还行，请点个 star 支持一下吧

欢迎前来交流探讨： 企鹅群568015492 

麻烦博客下方点个【推荐】，谢谢

NuGet

Install-Package HZH_Controls

目录

https://www.cnblogs.com/bfyx/p/11364884.html

用处及效果

 HZH_Controls.Forms.FrmAnchorTips.ShowTips(button1, "测试提示信息\nLEFT", AnchorTipsLocation.LEFT);

             HZH_Controls.Forms.FrmAnchorTips.ShowTips(button1, "测试提示信息\nRIGHT", AnchorTipsLocation.RIGHT);

             HZH_Controls.Forms.FrmAnchorTips.ShowTips(button1, "测试提示信息\nTOP", AnchorTipsLocation.TOP);

             HZH_Controls.Forms.FrmAnchorTips.ShowTips(button1, "测试提示信息\nBOTTOM", AnchorTipsLocation.BOTTOM);

准备工作

依然是GDI+画图，不懂可以自行百度一下

开始

思路是：根据参数画图，根据图显示不规则窗体

添加一个窗体FrmAnchorTips

重写一些函数

   #region Override

         protected override void OnClosing(CancelEventArgs e)

         {

             e.Cancel = true;

             base.OnClosing(e);

             haveHandle = false;

             this.Dispose();

         }

         protected override void OnHandleCreated(EventArgs e)

         {

             InitializeStyles();

             base.OnHandleCreated(e);

             haveHandle = true;

         }

         protected override CreateParams CreateParams

         {

             get

             {

                 CreateParams cParms = base.CreateParams;

                 cParms.ExStyle |= 0x00080000; // WS_EX_LAYERED

                 return cParms;

             }

         }

         #endregion

  private void InitializeStyles()

         {

             SetStyle(ControlStyles.AllPaintingInWmPaint, true);

             SetStyle(ControlStyles.UserPaint, true);

             UpdateStyles();

         }

根据图片显示窗体，这个是网上copy的

  #region 根据图片显示窗体    English:Display Forms Based on Pictures

         /// <summary>

         /// 功能描述:根据图片显示窗体    English:Display Forms Based on Pictures

         /// 作　　者:HZH

         /// 创建日期:2019-08-29 15:31:16

         /// 任务编号:

         /// </summary>

         /// <param name="bitmap">bitmap</param>

         private void SetBits(Bitmap bitmap)

         {

             if (!haveHandle) return;

             if (!Bitmap.IsCanonicalPixelFormat(bitmap.PixelFormat) || !Bitmap.IsAlphaPixelFormat(bitmap.PixelFormat))

                 throw new ApplicationException("The picture must be 32bit picture with alpha channel.");

             IntPtr oldBits = IntPtr.Zero;

             IntPtr screenDC = Win32.GetDC(IntPtr.Zero);

             IntPtr hBitmap = IntPtr.Zero;

             IntPtr memDc = Win32.CreateCompatibleDC(screenDC);

             try

             {

                 Win32.Point topLoc = new Win32.Point(Left, Top);

                 Win32.Size bitMapSize = new Win32.Size(bitmap.Width, bitmap.Height);

                 Win32.BLENDFUNCTION blendFunc = new Win32.BLENDFUNCTION();

                 Win32.Point srcLoc = new Win32.Point(, );

                 hBitmap = bitmap.GetHbitmap(Color.FromArgb());

                 oldBits = Win32.SelectObject(memDc, hBitmap);

                 blendFunc.BlendOp = Win32.AC_SRC_OVER;

                 blendFunc.SourceConstantAlpha = ;

                 blendFunc.AlphaFormat = Win32.AC_SRC_ALPHA;

                 blendFunc.BlendFlags = ;

                 Win32.UpdateLayeredWindow(Handle, screenDC, ref topLoc, ref bitMapSize, memDc, ref srcLoc, , ref blendFunc, Win32.ULW_ALPHA);

             }

             finally

             {

                 if (hBitmap != IntPtr.Zero)

                 {

                     Win32.SelectObject(memDc, oldBits);

                     Win32.DeleteObject(hBitmap);

                 }

                 Win32.ReleaseDC(IntPtr.Zero, screenDC);

                 Win32.DeleteDC(memDc);

             }

         }

         #endregion

然后是win32类

  class Win32

     {

         [StructLayout(LayoutKind.Sequential)]

         public struct Size

         {

             public Int32 cx;

             public Int32 cy;

             public Size(Int32 x, Int32 y)

             {

                 cx = x;

                 cy = y;

             }

         }

         [StructLayout(LayoutKind.Sequential, Pack = )]

         public struct BLENDFUNCTION

         {

             public byte BlendOp;

             public byte BlendFlags;

             public byte SourceConstantAlpha;

             public byte AlphaFormat;

         }

         [StructLayout(LayoutKind.Sequential)]

         public struct Point

         {

             public Int32 x;

             public Int32 y;

             public Point(Int32 x, Int32 y)

             {

                 this.x = x;

                 this.y = y;

             }

         }

         public const byte AC_SRC_OVER = ;

         public const Int32 ULW_ALPHA = ;

         public const byte AC_SRC_ALPHA = ;

         [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]

         public static extern IntPtr CreateCompatibleDC(IntPtr hDC);

         [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]

         public static extern IntPtr GetDC(IntPtr hWnd);

         [DllImport("gdi32.dll", ExactSpelling = true)]

         public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObj);

         [DllImport("user32.dll", ExactSpelling = true)]

         public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);

         [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]

         public static extern int DeleteDC(IntPtr hDC);

         [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]

         public static extern int DeleteObject(IntPtr hObj);

         [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]

         public static extern int UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst, ref Point pptDst, ref Size psize, IntPtr hdcSrc, ref Point pptSrc, Int32 crKey, ref BLENDFUNCTION pblend, Int32 dwFlags);

         [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]

         public static extern IntPtr ExtCreateRegion(IntPtr lpXform, uint nCount, IntPtr rgnData);

     }

然后就是构造函数了，根据传入参数，画出图片并设置窗体

  #region 构造函数    English:Constructor

         /// <summary>

         /// 功能描述:构造函数    English:Constructor

         /// 作　　者:HZH

         /// 创建日期:2019-08-29 15:27:51

         /// 任务编号:

         /// </summary>

         /// <param name="rectControl">停靠区域</param>

         /// <param name="strMsg">消息</param>

         /// <param name="location">显示方位</param>

         /// <param name="background">背景色</param>

         /// <param name="foreColor">文字颜色</param>

         /// <param name="fontSize">文字大小</param>

         /// <param name="autoCloseTime">自动关闭时间，当<=0时不自动关闭</param>

         private FrmAnchorTips(

             Rectangle rectControl,

             string strMsg,

             AnchorTipsLocation location = AnchorTipsLocation.RIGHT,

             Color? background = null,

             Color? foreColor = null,

             int fontSize = ,

             int autoCloseTime = )

         {

             InitializeComponent();

             Graphics g = this.CreateGraphics();

             Font _font = new Font("微软雅黑", fontSize);

             Color _background = background == null ? Color.FromArgb(, , ) : background.Value;

             Color _foreColor = foreColor == null ? Color.White : foreColor.Value;

             System.Drawing.SizeF sizeText = g.MeasureString(strMsg, _font);

             g.Dispose();

             var formSize = new Size((int)sizeText.Width + , (int)sizeText.Height + );

             if (formSize.Width < )

                 formSize.Width = ;

             if (formSize.Height < )

                 formSize.Height = ;

             if (location == AnchorTipsLocation.LEFT || location == AnchorTipsLocation.RIGHT)

             {

                 formSize.Width += ;

             }

             else

             {

                 formSize.Height += ;

             }

             #region 获取窗体path    English:Get the form path

             GraphicsPath path = new GraphicsPath();

             Rectangle rect;

             switch (location)

             {

                 case AnchorTipsLocation.TOP:

                     rect = new Rectangle(, , formSize.Width - , formSize.Height -  - );

                     this.Location = new Point(rectControl.X + (rectControl.Width - rect.Width) / , rectControl.Y - rect.Height - );

                     break;

                 case AnchorTipsLocation.RIGHT:

                     rect = new Rectangle(, , formSize.Width -  - , formSize.Height - );

                     this.Location = new Point(rectControl.Right, rectControl.Y + (rectControl.Height - rect.Height) / );

                     break;

                 case AnchorTipsLocation.BOTTOM:

                     rect = new Rectangle(, , formSize.Width - , formSize.Height -  - );

                     this.Location = new Point(rectControl.X + (rectControl.Width - rect.Width) / , rectControl.Bottom);

                     break;

                 default:

                     rect = new Rectangle(, , formSize.Width -  - , formSize.Height - );

                     this.Location = new Point(rectControl.X - rect.Width - , rectControl.Y + (rectControl.Height - rect.Height) / );

                     break;

             }

             int cornerRadius = ;

             path.AddArc(rect.X, rect.Y, cornerRadius * , cornerRadius * , , );//左上角

             #region 上边

             if (location == AnchorTipsLocation.BOTTOM)

             {

                 path.AddLine(rect.X + cornerRadius, rect.Y, rect.Left + rect.Width /  - , rect.Y);//上

                 path.AddLine(rect.Left + rect.Width /  - , rect.Y, rect.Left + rect.Width / , rect.Y - );//上

                 path.AddLine(rect.Left + rect.Width / , rect.Y - , rect.Left + rect.Width /  + , rect.Y);//上

                 path.AddLine(rect.Left + rect.Width /  + , rect.Y, rect.Right - cornerRadius * , rect.Y);//上

             }

             else

             {

                 path.AddLine(rect.X + cornerRadius, rect.Y, rect.Right - cornerRadius * , rect.Y);//上

             }

             #endregion

             path.AddArc(rect.X + rect.Width - cornerRadius * , rect.Y, cornerRadius * , cornerRadius * , , );//右上角

             #region 右边

             if (location == AnchorTipsLocation.LEFT)

             {

                 path.AddLine(rect.Right, rect.Y + cornerRadius * , rect.Right, rect.Y + rect.Height /  - );//右

                 path.AddLine(rect.Right, rect.Y + rect.Height /  - , rect.Right + , rect.Y + rect.Height / );//右

                 path.AddLine(rect.Right + , rect.Y + rect.Height / , rect.Right, rect.Y + rect.Height /  + );//右

                 path.AddLine(rect.Right, rect.Y + rect.Height /  + , rect.Right, rect.Y + rect.Height - cornerRadius * );//右

             }

             else

             {

                 path.AddLine(rect.Right, rect.Y + cornerRadius * , rect.Right, rect.Y + rect.Height - cornerRadius * );//右

             }

             #endregion

             path.AddArc(rect.X + rect.Width - cornerRadius * , rect.Y + rect.Height - cornerRadius * , cornerRadius * , cornerRadius * , , );//右下角

             #region 下边

             if (location == AnchorTipsLocation.TOP)

             {

                 path.AddLine(rect.Right - cornerRadius * , rect.Bottom, rect.Left + rect.Width /  + , rect.Bottom);

                 path.AddLine(rect.Left + rect.Width /  + , rect.Bottom, rect.Left + rect.Width / , rect.Bottom + );

                 path.AddLine(rect.Left + rect.Width / , rect.Bottom + , rect.Left + rect.Width /  - , rect.Bottom);

                 path.AddLine(rect.Left + rect.Width /  - , rect.Bottom, rect.X + cornerRadius * , rect.Bottom);

             }

             else

             {

                 path.AddLine(rect.Right - cornerRadius * , rect.Bottom, rect.X + cornerRadius * , rect.Bottom);

             }

             #endregion

             path.AddArc(rect.X, rect.Bottom - cornerRadius * , cornerRadius * , cornerRadius * , , );//左下角

             #region 左边

             if (location == AnchorTipsLocation.RIGHT)

             {

                 path.AddLine(rect.Left, rect.Y + cornerRadius * , rect.Left, rect.Y + rect.Height /  - );//左

                 path.AddLine(rect.Left, rect.Y + rect.Height /  - , rect.Left - , rect.Y + rect.Height / );//左

                 path.AddLine(rect.Left - , rect.Y + rect.Height / , rect.Left, rect.Y + rect.Height /  + );//左

                 path.AddLine(rect.Left, rect.Y + rect.Height /  + , rect.Left, rect.Y + rect.Height - cornerRadius * );//左

             }

             else

             {

                 path.AddLine(rect.X, rect.Bottom - cornerRadius * , rect.X, rect.Y + cornerRadius * );//左

             }

             #endregion

             path.CloseFigure();

             #endregion

             Bitmap bit = new Bitmap(formSize.Width, formSize.Height);

             this.Size = formSize;

             #region 画图    English:Drawing

             Graphics gBit = Graphics.FromImage(bit);

             gBit.SetGDIHigh();

             gBit.FillPath(new SolidBrush(_background), path);

             gBit.DrawString(strMsg, _font, new SolidBrush(_foreColor), rect.Location + new Size(, ));

             gBit.Dispose();

             #endregion

             SetBits(bit);

             if (autoCloseTime > )

             {

                 Timer t = new Timer();

                 t.Interval = autoCloseTime;

                 t.Tick += (a, b) =>

                 {

                     this.Close();

                 };

                 t.Enabled = true;

             }

         }

         #endregion

再来2个静态函数以供调用

  #region 显示一个提示    English:Show a hint

         /// <summary>

         /// 功能描述:显示一个提示    English:Show a hint

         /// 作　　者:HZH

         /// 创建日期:2019-08-29 15:28:58

         /// 任务编号:

         /// </summary>

         /// <param name="parentControl">停靠控件</param>

         /// <param name="strMsg">消息</param>

         /// <param name="location">显示方位</param>

         /// <param name="background">背景色</param>

         /// <param name="foreColor">文字颜色</param>

         /// <param name="deviation">偏移量</param>

         /// <param name="fontSize">文字大小</param>

         /// <param name="autoCloseTime">自动关闭时间，当<=0时不自动关闭</param>

         public static FrmAnchorTips ShowTips(

             Control parentControl,

             string strMsg,

             AnchorTipsLocation location = AnchorTipsLocation.RIGHT,

             Color? background = null,

             Color? foreColor = null,

             Size? deviation = null,

             int fontSize = ,

             int autoCloseTime = )

         {

             Point p;

             if (parentControl is Form)

             {

                 p = parentControl.Location;

             }

             else

             {

                 p = parentControl.Parent.PointToScreen(parentControl.Location);

             }

             if (deviation != null)

             {

                 p = p + deviation.Value;

             }

             return ShowTips(parentControl.FindForm(), new Rectangle(p, parentControl.Size), strMsg, location, background, foreColor, fontSize, autoCloseTime);

         }

         #endregion

         #region 显示一个提示    English:Show a hint

         /// <summary>

         /// 功能描述:显示一个提示    English:Show a hint

         /// 作　　者:HZH

         /// 创建日期:2019-08-29 15:29:07

         /// 任务编号:

         /// </summary>

         /// <param name="parentForm">父窗体</param>

         /// <param name="rectControl">停靠区域</param>

         /// <param name="strMsg">消息</param>

         /// <param name="location">显示方位</param>

         /// <param name="background">背景色</param>

         /// <param name="foreColor">文字颜色</param>

         /// <param name="fontSize">文字大小</param>

         /// <param name="autoCloseTime">自动关闭时间，当<=0时不自动关闭</param>

         /// <returns>返回值</returns>

         public static FrmAnchorTips ShowTips(

             Form parentForm,

             Rectangle rectControl,

             string strMsg,

             AnchorTipsLocation location = AnchorTipsLocation.RIGHT,

             Color? background = null,

             Color? foreColor = null,

             int fontSize = ,

             int autoCloseTime = )

         {

             FrmAnchorTips frm = new FrmAnchorTips(rectControl, strMsg, location, background, foreColor, fontSize, autoCloseTime);

             frm.TopMost = true;

             frm.Show(parentForm);

             return frm;

         }

         #endregion

全部代码

 using System;

 using System.Collections.Generic;

 using System.ComponentModel;

 using System.Data;

 using System.Drawing;

 using System.Drawing.Drawing2D;

 using System.Linq;

 using System.Runtime.InteropServices;

 using System.Text;

 using System.Windows.Forms;

 namespace HZH_Controls.Forms

 {

     public partial class FrmAnchorTips : Form

     {

         bool haveHandle = false;

         #region 构造函数    English:Constructor

         /// <summary>

         /// 功能描述:构造函数    English:Constructor

         /// 作　　者:HZH

         /// 创建日期:2019-08-29 15:27:51

         /// 任务编号:

         /// </summary>

         /// <param name="rectControl">停靠区域</param>

         /// <param name="strMsg">消息</param>

         /// <param name="location">显示方位</param>

         /// <param name="background">背景色</param>

         /// <param name="foreColor">文字颜色</param>

         /// <param name="fontSize">文字大小</param>

         /// <param name="autoCloseTime">自动关闭时间，当<=0时不自动关闭</param>

         private FrmAnchorTips(

             Rectangle rectControl,

             string strMsg,

             AnchorTipsLocation location = AnchorTipsLocation.RIGHT,

             Color? background = null,

             Color? foreColor = null,

             int fontSize = ,

             int autoCloseTime = )

         {

             InitializeComponent();

             Graphics g = this.CreateGraphics();

             Font _font = new Font("微软雅黑", fontSize);

             Color _background = background == null ? Color.FromArgb(, , ) : background.Value;

             Color _foreColor = foreColor == null ? Color.White : foreColor.Value;

             System.Drawing.SizeF sizeText = g.MeasureString(strMsg, _font);

             g.Dispose();

             var formSize = new Size((int)sizeText.Width + , (int)sizeText.Height + );

             if (formSize.Width < )

                 formSize.Width = ;

             if (formSize.Height < )

                 formSize.Height = ;

             if (location == AnchorTipsLocation.LEFT || location == AnchorTipsLocation.RIGHT)

             {

                 formSize.Width += ;

             }

             else

             {

                 formSize.Height += ;

             }

             #region 获取窗体path    English:Get the form path

             GraphicsPath path = new GraphicsPath();

             Rectangle rect;

             switch (location)

             {

                 case AnchorTipsLocation.TOP:

                     rect = new Rectangle(, , formSize.Width - , formSize.Height -  - );

                     this.Location = new Point(rectControl.X + (rectControl.Width - rect.Width) / , rectControl.Y - rect.Height - );

                     break;

                 case AnchorTipsLocation.RIGHT:

                     rect = new Rectangle(, , formSize.Width -  - , formSize.Height - );

                     this.Location = new Point(rectControl.Right, rectControl.Y + (rectControl.Height - rect.Height) / );

                     break;

                 case AnchorTipsLocation.BOTTOM:

                     rect = new Rectangle(, , formSize.Width - , formSize.Height -  - );

                     this.Location = new Point(rectControl.X + (rectControl.Width - rect.Width) / , rectControl.Bottom);

                     break;

                 default:

                     rect = new Rectangle(, , formSize.Width -  - , formSize.Height - );

                     this.Location = new Point(rectControl.X - rect.Width - , rectControl.Y + (rectControl.Height - rect.Height) / );

                     break;

             }

             int cornerRadius = ;

             path.AddArc(rect.X, rect.Y, cornerRadius * , cornerRadius * , , );//左上角

             #region 上边

             if (location == AnchorTipsLocation.BOTTOM)

             {

                 path.AddLine(rect.X + cornerRadius, rect.Y, rect.Left + rect.Width /  - , rect.Y);//上

                 path.AddLine(rect.Left + rect.Width /  - , rect.Y, rect.Left + rect.Width / , rect.Y - );//上

                 path.AddLine(rect.Left + rect.Width / , rect.Y - , rect.Left + rect.Width /  + , rect.Y);//上

                 path.AddLine(rect.Left + rect.Width /  + , rect.Y, rect.Right - cornerRadius * , rect.Y);//上

             }

             else

             {

                 path.AddLine(rect.X + cornerRadius, rect.Y, rect.Right - cornerRadius * , rect.Y);//上

             }

             #endregion

             path.AddArc(rect.X + rect.Width - cornerRadius * , rect.Y, cornerRadius * , cornerRadius * , , );//右上角

             #region 右边

             if (location == AnchorTipsLocation.LEFT)

             {

                 path.AddLine(rect.Right, rect.Y + cornerRadius * , rect.Right, rect.Y + rect.Height /  - );//右

                 path.AddLine(rect.Right, rect.Y + rect.Height /  - , rect.Right + , rect.Y + rect.Height / );//右

                 path.AddLine(rect.Right + , rect.Y + rect.Height / , rect.Right, rect.Y + rect.Height /  + );//右

                 path.AddLine(rect.Right, rect.Y + rect.Height /  + , rect.Right, rect.Y + rect.Height - cornerRadius * );//右

             }

             else

             {

                 path.AddLine(rect.Right, rect.Y + cornerRadius * , rect.Right, rect.Y + rect.Height - cornerRadius * );//右

             }

             #endregion

             path.AddArc(rect.X + rect.Width - cornerRadius * , rect.Y + rect.Height - cornerRadius * , cornerRadius * , cornerRadius * , , );//右下角

             #region 下边

             if (location == AnchorTipsLocation.TOP)

             {

                 path.AddLine(rect.Right - cornerRadius * , rect.Bottom, rect.Left + rect.Width /  + , rect.Bottom);

                 path.AddLine(rect.Left + rect.Width /  + , rect.Bottom, rect.Left + rect.Width / , rect.Bottom + );

                 path.AddLine(rect.Left + rect.Width / , rect.Bottom + , rect.Left + rect.Width /  - , rect.Bottom);

                 path.AddLine(rect.Left + rect.Width /  - , rect.Bottom, rect.X + cornerRadius * , rect.Bottom);

             }

             else

             {

                 path.AddLine(rect.Right - cornerRadius * , rect.Bottom, rect.X + cornerRadius * , rect.Bottom);

             }

             #endregion

             path.AddArc(rect.X, rect.Bottom - cornerRadius * , cornerRadius * , cornerRadius * , , );//左下角

             #region 左边

             if (location == AnchorTipsLocation.RIGHT)

             {

                 path.AddLine(rect.Left, rect.Y + cornerRadius * , rect.Left, rect.Y + rect.Height /  - );//左

                 path.AddLine(rect.Left, rect.Y + rect.Height /  - , rect.Left - , rect.Y + rect.Height / );//左

                 path.AddLine(rect.Left - , rect.Y + rect.Height / , rect.Left, rect.Y + rect.Height /  + );//左

                 path.AddLine(rect.Left, rect.Y + rect.Height /  + , rect.Left, rect.Y + rect.Height - cornerRadius * );//左

             }

             else

             {

                 path.AddLine(rect.X, rect.Bottom - cornerRadius * , rect.X, rect.Y + cornerRadius * );//左

             }

             #endregion

             path.CloseFigure();

             #endregion

             Bitmap bit = new Bitmap(formSize.Width, formSize.Height);

             this.Size = formSize;

             #region 画图    English:Drawing

             Graphics gBit = Graphics.FromImage(bit);

             gBit.SetGDIHigh();

             gBit.FillPath(new SolidBrush(_background), path);

             gBit.DrawString(strMsg, _font, new SolidBrush(_foreColor), rect.Location + new Size(, ));

             gBit.Dispose();

             #endregion

             SetBits(bit);

             if (autoCloseTime > )

             {

                 Timer t = new Timer();

                 t.Interval = autoCloseTime;

                 t.Tick += (a, b) =>

                 {

                     this.Close();

                 };

                 t.Enabled = true;

             }

         }

         #endregion

         #region 显示一个提示    English:Show a hint

         /// <summary>

         /// 功能描述:显示一个提示    English:Show a hint

         /// 作　　者:HZH

         /// 创建日期:2019-08-29 15:28:58

         /// 任务编号:

         /// </summary>

         /// <param name="parentControl">停靠控件</param>

         /// <param name="strMsg">消息</param>

         /// <param name="location">显示方位</param>

         /// <param name="background">背景色</param>

         /// <param name="foreColor">文字颜色</param>

         /// <param name="deviation">偏移量</param>

         /// <param name="fontSize">文字大小</param>

         /// <param name="autoCloseTime">自动关闭时间，当<=0时不自动关闭</param>

         public static FrmAnchorTips ShowTips(

             Control parentControl,

             string strMsg,

             AnchorTipsLocation location = AnchorTipsLocation.RIGHT,

             Color? background = null,

             Color? foreColor = null,

             Size? deviation = null,

             int fontSize = ,

             int autoCloseTime = )

         {

             Point p;

             if (parentControl is Form)

             {

                 p = parentControl.Location;

             }

             else

             {

                 p = parentControl.Parent.PointToScreen(parentControl.Location);

             }

             if (deviation != null)

             {

                 p = p + deviation.Value;

             }

             return ShowTips(parentControl.FindForm(), new Rectangle(p, parentControl.Size), strMsg, location, background, foreColor, fontSize, autoCloseTime);

         }

         #endregion

         #region 显示一个提示    English:Show a hint

         /// <summary>

         /// 功能描述:显示一个提示    English:Show a hint

         /// 作　　者:HZH

         /// 创建日期:2019-08-29 15:29:07

         /// 任务编号:

         /// </summary>

         /// <param name="parentForm">父窗体</param>

         /// <param name="rectControl">停靠区域</param>

         /// <param name="strMsg">消息</param>

         /// <param name="location">显示方位</param>

         /// <param name="background">背景色</param>

         /// <param name="foreColor">文字颜色</param>

         /// <param name="fontSize">文字大小</param>

         /// <param name="autoCloseTime">自动关闭时间，当<=0时不自动关闭</param>

         /// <returns>返回值</returns>

         public static FrmAnchorTips ShowTips(

             Form parentForm,

             Rectangle rectControl,

             string strMsg,

             AnchorTipsLocation location = AnchorTipsLocation.RIGHT,

             Color? background = null,

             Color? foreColor = null,

             int fontSize = ,

             int autoCloseTime = )

         {

             FrmAnchorTips frm = new FrmAnchorTips(rectControl, strMsg, location, background, foreColor, fontSize, autoCloseTime);

             frm.TopMost = true;

             frm.Show(parentForm);

             return frm;

         }

         #endregion

         #region Override

         protected override void OnClosing(CancelEventArgs e)

         {

             e.Cancel = true;

             base.OnClosing(e);

             haveHandle = false;

             this.Dispose();

         }

         protected override void OnHandleCreated(EventArgs e)

         {

             InitializeStyles();

             base.OnHandleCreated(e);

             haveHandle = true;

         }

         protected override CreateParams CreateParams

         {

             get

             {

                 CreateParams cParms = base.CreateParams;

                 cParms.ExStyle |= 0x00080000; // WS_EX_LAYERED

                 return cParms;

             }

         }

         #endregion

         private void InitializeStyles()

         {

             SetStyle(ControlStyles.AllPaintingInWmPaint, true);

             SetStyle(ControlStyles.UserPaint, true);

             UpdateStyles();

         }

         #region 根据图片显示窗体    English:Display Forms Based on Pictures

         /// <summary>

         /// 功能描述:根据图片显示窗体    English:Display Forms Based on Pictures

         /// 作　　者:HZH

         /// 创建日期:2019-08-29 15:31:16

         /// 任务编号:

         /// </summary>

         /// <param name="bitmap">bitmap</param>

         private void SetBits(Bitmap bitmap)

         {

             if (!haveHandle) return;

             if (!Bitmap.IsCanonicalPixelFormat(bitmap.PixelFormat) || !Bitmap.IsAlphaPixelFormat(bitmap.PixelFormat))

                 throw new ApplicationException("The picture must be 32bit picture with alpha channel.");

             IntPtr oldBits = IntPtr.Zero;

             IntPtr screenDC = Win32.GetDC(IntPtr.Zero);

             IntPtr hBitmap = IntPtr.Zero;

             IntPtr memDc = Win32.CreateCompatibleDC(screenDC);

             try

             {

                 Win32.Point topLoc = new Win32.Point(Left, Top);

                 Win32.Size bitMapSize = new Win32.Size(bitmap.Width, bitmap.Height);

                 Win32.BLENDFUNCTION blendFunc = new Win32.BLENDFUNCTION();

                 Win32.Point srcLoc = new Win32.Point(, );

                 hBitmap = bitmap.GetHbitmap(Color.FromArgb());

                 oldBits = Win32.SelectObject(memDc, hBitmap);

                 blendFunc.BlendOp = Win32.AC_SRC_OVER;

                 blendFunc.SourceConstantAlpha = ;

                 blendFunc.AlphaFormat = Win32.AC_SRC_ALPHA;

                 blendFunc.BlendFlags = ;

                 Win32.UpdateLayeredWindow(Handle, screenDC, ref topLoc, ref bitMapSize, memDc, ref srcLoc, , ref blendFunc, Win32.ULW_ALPHA);

             }

             finally

             {

                 if (hBitmap != IntPtr.Zero)

                 {

                     Win32.SelectObject(memDc, oldBits);

                     Win32.DeleteObject(hBitmap);

                 }

                 Win32.ReleaseDC(IntPtr.Zero, screenDC);

                 Win32.DeleteDC(memDc);

             }

         }

         #endregion

     }

     public enum AnchorTipsLocation

     {

         LEFT,

         TOP,

         RIGHT,

         BOTTOM

     }

     class Win32

     {

         [StructLayout(LayoutKind.Sequential)]

         public struct Size

         {

             public Int32 cx;

             public Int32 cy;

             public Size(Int32 x, Int32 y)

             {

                 cx = x;

                 cy = y;

             }

         }

         [StructLayout(LayoutKind.Sequential, Pack = )]

         public struct BLENDFUNCTION

         {

             public byte BlendOp;

             public byte BlendFlags;

             public byte SourceConstantAlpha;

             public byte AlphaFormat;

         }

         [StructLayout(LayoutKind.Sequential)]

         public struct Point

         {

             public Int32 x;

             public Int32 y;

             public Point(Int32 x, Int32 y)

             {

                 this.x = x;

                 this.y = y;

             }

         }

         public const byte AC_SRC_OVER = ;

         public const Int32 ULW_ALPHA = ;

         public const byte AC_SRC_ALPHA = ;

         [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]

         public static extern IntPtr CreateCompatibleDC(IntPtr hDC);

         [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]

         public static extern IntPtr GetDC(IntPtr hWnd);

         [DllImport("gdi32.dll", ExactSpelling = true)]

         public static extern IntPtr SelectObject(IntPtr hDC, IntPtr hObj);

         [DllImport("user32.dll", ExactSpelling = true)]

         public static extern int ReleaseDC(IntPtr hWnd, IntPtr hDC);

         [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]

         public static extern int DeleteDC(IntPtr hDC);

         [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]

         public static extern int DeleteObject(IntPtr hObj);

         [DllImport("user32.dll", ExactSpelling = true, SetLastError = true)]

         public static extern int UpdateLayeredWindow(IntPtr hwnd, IntPtr hdcDst, ref Point pptDst, ref Size psize, IntPtr hdcSrc, ref Point pptSrc, Int32 crKey, ref BLENDFUNCTION pblend, Int32 dwFlags);

         [DllImport("gdi32.dll", ExactSpelling = true, SetLastError = true)]

         public static extern IntPtr ExtCreateRegion(IntPtr lpXform, uint nCount, IntPtr rgnData);

     }

 }

 namespace HZH_Controls.Forms

 {

     partial class FrmAnchorTips

     {

         /// <summary>

         /// Required designer variable.

         /// </summary>

         private System.ComponentModel.IContainer components = null;

         /// <summary>

         /// Clean up any resources being used.

         /// </summary>

         /// <param name="disposing">true if managed resources should be disposed; otherwise, false.</param>

         protected override void Dispose(bool disposing)

         {

             if (disposing && (components != null))

             {

                 components.Dispose();

             }

             base.Dispose(disposing);

         }

         #region Windows Form Designer generated code

         /// <summary>

         /// Required method for Designer support - do not modify

         /// the contents of this method with the code editor.

         /// </summary>

         private void InitializeComponent()

         {

             this.SuspendLayout();

             //

             // FrmAnchorTips

             //

             this.AutoScaleDimensions = new System.Drawing.SizeF(6F, 12F);

             this.AutoScaleMode = System.Windows.Forms.AutoScaleMode.Font;

             this.ClientSize = new System.Drawing.Size(, );

             this.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None;

             this.Name = "FrmAnchorTips";

             this.StartPosition = System.Windows.Forms.FormStartPosition.Manual;

             this.Text = "FrmAnchorTips";

             this.ResumeLayout(false);

         }

         #endregion

     }

 }

最后的话

如果你喜欢的话，请到 https://gitee.com/kwwwvagaa/net_winform_custom_control 点个星星吧