Question

I want to trap keyboard messages in a console application, so I tried this:

HWND GetConsoleHwnd(void)
{
    #define SIZEBUF 1024
    char szBuffer[SIZEBUF];

    GetConsoleTitle(szBuffer, SIZEBUF);

    #undef SIZEBUF
    return FindWindow(NULL, szBuffer);
}

LRESULT CALLBACK ConsoleProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch (msg)
    {
        case WM_KEYDOWN:
            switch (wParam)
            {
               //VK Cases
            }
            break;
    }

    return CallWindowProc(OldConsoleProc, hwnd, msg, wParam, lParam);
}

this in main:

HWND hwndConsole = GetConsoleHwnd();
OldConsoleProc = (WNDPROC) SetWindowLong(hwndConsole, GWL_WNDPROC,
                               ConsoleProc);

and this Global Var: WNDPROC OldConsoleProc;

but it doesnt work, what I am doing wrong?

Answer 1

You can’t subclass a window of another process this way. You can do it with hooks but I wouldn’t recommend trying this on console window. ReadConsoleInput is low-level enough, and it’s as far as you can get without ugly nonportable hacks (I’m not even sure there are some events reaching WndProc when the console window is full screen).