To accomplish this, I have tried different approaches: posting WM_PASTE, SendKeys sending ctrl-v… None of the method seems to be working so well.
A friend from work suggested trying WM_COMMAND. Since Spy++ doesn’t work with cmd.exe, we had to use brute force to find the correct WPARAM for pasting.
The result is really simple, just one line code with C++:
// hwnd is the window handle of a CMD window
SendMessage(hwnd, WM_COMMAND, 0xfff1, 0);
And here’s the C# version with PInvoke:
[DllImport("user32")]
private static extern IntPtr SendMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam);
private const uint WM_COMMAND = 0x0111;
SendMessage(hwnd, WM_COMMAND, (IntPtr)0xfff1, IntPtr.Zero);
This is fantastic and works exactly as I need it to. Thank you for exploring and sharing!
As a follow-up, if anyone needs to paste into a Putty.exe window, the parameter is 0x0190 instead of 0xfff1. This was found through brute force… Other values also worked, but I chose that one since the decimal (400) seemed nice and round.
Very helpful, thanks!
Thank you, it works like a charm!