Thread: Finding windows

  1. #1
    Registered User
    Join Date
    Sep 2007

    Finding windows

    I'm trying to get the process name of a window that changes, but always contains a certain substring.. is there any way to do this without knowing the process and only knowing part of the window? I've heard to use EnumWindows.. but I don't know how it works and how to get window titles using it. Thanks

  2. #2
    Registered User
    Join Date
    Oct 2008
    EnumWindows takes a function pointer to a callback function which is passed the window handles one at a time (and an application-defined LPARAM):
    enumWindowsProc( HWND hwnd, LPARAM lp)
        char buf[ BUFSIZE];
        GetWindowText( hwnd, buf, BUFSIZE);
        // check it for substring ...
        return TRUE; // or FALSE to end enumeration
    EnumWindows( enumWindowsProc, 0);

  3. #3
    Registered User
    Join Date
    Sep 2007
    thanks, I got it.. I essentially used that.. my code is

    // check if a window is the one you're looking for
    BOOL CALLBACK checkWindow(HWND hwnd,LPARAM param)
    	// where to copy the window title
    	char window_title[128] = {0};
    	// politely ask the target window to copy its title into our buffer
    	// if the target window title is bigger than the current window title, null terminate the target window title,
    	// otherwise, null terminate the current window title
    	((sizeof(target_windowtitle)>sizeof(window_title)) ? target_windowtitle[sizeof(window_title)-1] : window_title[sizeof(target_windowtitle)-1]) = 0;
    	// search for our wanted title inside the passed title,
    	// and if it's found...
    		// cast our parameter to a pointer and set its target to the current window (AKA success)
    		*(HWND*)param = hwnd;
    		// stop checking the windows
    		return false;
    	// otherwise keep checking windows
    	else return true;

  4. #4
    and the Hat of Guessing tabstop's Avatar
    Join Date
    Nov 2007
    You should have read nucleon's post, or MSDN:
    Quote Originally Posted by MSDN
    EnumWindows continues until the last top-level window is enumerated or the callback function returns FALSE.

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