C＃使用SendMessage函数将字符串发送到另一个Appliaction

问题描述

大家好！

i我正在尝试将字符串发送到另一个应用程序。

我尝试这样做的方法是使用windows api中的SendMessage函数，我正在将WParam参数设置为字符串值（当我导入该函数时，我确实使用了此参数的字符串类型）。

现在在接收应用程序中我已将其设置为接收消息并将WParam值的内容放入文本框中，但问题是它没有字符串（我使用了测试字符串Hello World！）它只有一堆数字并将这些数字放入文本框。我在做错了什么？

这里是我在发送应用程序中使用的代码：

这些是我用于SendMessage方法的参数

hello everyone!
i am trying to send a string to another application.
the way i am trying to do this is by using the SendMessage function in the windows api, and i am setting the WParam parameter to a string value(when i imported the function i did use a string type for this parameter).
now in the receiving app i have it setup to receive the message and to put the contents of the WParam value into a textbox, but the problem is it doesn't have a string(i used a test string of "Hello World!") it just has a bunch of numbers and it puts those numbers into the text box. so what am i doing wrong?
here is the code i am using in my sending app:
these are the parameters i am using for the SendMessage Method

[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern string SendMessage(int hWnd, int msg, string wParam, IntPtr lParam);

and this line is ran when a button in the form is clicked:

ParentFormHandle = ParentHandle.ToInt32();
SendMessage(ParentFormHandle, 40, "Hello World!", IntPtr.Zero);

这是我在使用的代码复活的应用程序：

this is the code i am using in the reciving app:

protected override void WndProc(ref Message m)
{
    if (m.Msg == 40)
    {
        YourTextBoxNameHere.Text += m.WParam.ToString();
    }
    else
    {
        base.WndProc(ref m);
    }
}

这里是WParam属性的结果，字符串为Hello World！：

39061140

现在，每当我关闭发送应用程序并再次打开它时，此值将会改变。

如果有人有更好的方法将字符串发送到应用程序请请告诉我。

感谢您提前提供的所有帮助，

MasterCodeon

here is the result of the WParam property with the string "Hello World!":
39061140
now every time i close the sending app and open it back up again this value will change.
if anyone has a better way to send a string to an application please let me know.
thanks for all of your help in advance,
MasterCodeon

推荐答案

//This Is The Wrong Way To Do It
Form newform = new MyFormOne();
//This Is The Correct Way To Do It
MyFormOne newform = new MyFormOne();

当我问这个问题时我不知道我做错了所以我决定使用windows api将字符串发送到另一个应用程序，但不久之后，我意识到我搞砸了并解决了我的问题。

谢谢大家的帮助，

MasterCodeon

when i asked this question i didn't know that i did that wrong so i decided to use the windows api to send a string to another app, but then soon after, i realized i screwed up and fixed my problem.
thank you all for your help,
MasterCodeon

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