SendMessage（F4）发送到窗口时失败

问题描述

使用Visual Studio 6（VC ++ 6.0）我使用的ActiveX日期控件，我无法显示扩展默认情况下（）。或者，我试图发送一个键盘消息（F4）到我的窗口打开控件，但没有发生任何事情，当我这样做...

  // try 1：使用标准窗口句柄
 LRESULT result = :: SendMessage（m_hWnd，VK_F4，0，0）; 
 // try 2：use只使用SendMessage 
 result = SendMessage（VK_F4）; 
  

结果总是0 - 我可以做什么来测试/验证邮件发送？

感谢acvance中许多...

Olli

解决方案

好的 - 这个问题有两种方法（感谢所有的帮助，伙计们）：

SendMessage正确的消息和正确的句柄：

  :: SendMessage（m_wndDatePicker.m_hWnd，WM_KEYDOWN，VK_F4，0）; 
  

或者使用SendInput：

  // important：设置焦点以控制第一个
 m_wndDatePicker.SetFocus（）; 
 
 INPUT * key; 
 
 key = new INPUT; 
 key-> type = INPUT_KEYBOARD; 
 key-> ki.wVk = VK_F4; 
 key-> ki.dwFlags = 0; 
 key-> ki.time = 0; 
 key-> ki.wScan = 0; 
 key-> ki.dwExtraInfo = 0; 
 
 SendInput（1，key，sizeof（INPUT））; 
  

Working with Visual Studio 6 (VC++ 6.0) I'm using an ActiveX datepicker control which I fail to show expanded by default (3006216). Alternatively I'm trying to send a keyboard message (F4) to my window to open up the control, but nothing happens when I do so...

// try 1: use the standard window handle
LRESULT result = ::SendMessage(m_hWnd,VK_F4, 0, 0);
// try 2: use just use the SendMessage
result = SendMessage(VK_F4);

result is always 0 - what can I do to test/verify the message sending?

Thanks in acvance a lot...

Olli

解决方案

Okay - there's two approaches on this issue (thanks for all the help, guys!):

First: Use "::SendMessage" with correct message AND correct handle:

::SendMessage(m_wndDatePicker.m_hWnd, WM_KEYDOWN, VK_F4, 0);

Alternatively use "SendInput":

// important: set focus to control first
m_wndDatePicker.SetFocus();

INPUT *key;

key = new INPUT;
key->type = INPUT_KEYBOARD;
key->ki.wVk = VK_F4;
key->ki.dwFlags = 0;
key->ki.time = 0;
key->ki.wScan = 0;
key->ki.dwExtraInfo = 0;

SendInput(1,key,sizeof(INPUT));

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