How to write and send text to mIRC in C#/Win32?

Question

In a previous question, I asked how to send text to Notepad. It helped me immensely. For part 2, here\'s a simplified version of the same applied mIRC:

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Answer 1

This code works for me (mirc 6.31):

IntPtr mainHandle = FindWindow("mIRC", null);
IntPtr serverHandle = FindWindowEx(mainHandle, new IntPtr(0), "MDIClient", null);  
IntPtr chanHandle = FindWindowEx(serverHandle, new IntPtr(0), "mIRC_Channel", null);  
IntPtr editHandle = FindWindowEx(chanHandle, new IntPtr(0), "richEdit20A", null);
SendMessage(editHandle, 0x000C, 0, "Hello World");

Notice the changed window class (richedit20A instead of edit). Just found the correct class by using Spy++.

As for the window handles, one possibility is to use the EnumWindows or EnumChildWindows API.