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:

[DllImport('User32.dll', EntryPoint = 'FindWindow')] public static extern IntPtr FindWindow(String lpClassName, String lpWindowName); [DllImport('user32.dll', EntryPoint = 'FindWindowEx')] public static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string lpszClass, string lpszWindow); [DllImport('User32.dll')] public static extern int SendMessage(IntPtr hWnd, int uMsg, int wParam, string lParam);  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), 'Edit', null);  SendMessage(editHandle, 0x000C, 0, textBox1.Text); 

This seems correct to me, except that it doesn’t work! Is it that the window names are incorrect (MDIClient, mIRC_Channel, and Edit)? These are values I found on a web site by googling ‘FindWindowEx mIRC’.

1.) What am I doing wrong in the above?

2.) For reference, in general is there an easy way to find all the Window names for use with FindWindowEx()?

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.