C ++ FindWindow查找当前窗口

Question

I have a program that opens a window (a video game, actually) on Windows 8.1. That program then calls an "extension" in the form of a C++ .DLL that I compiled. Within that DLL, I need to get a handle to the window of the program (the video game) that is calling the DLL. I can do this using the FindWindow command combined with the name of the video game window. However, I sometimes need to have 2 copies of it open at once, both with the same window name. This means that using FindWindow(windowName) is not guaranteed to select the window that I actually want. Is there a way to get a handle to the window that is the same application that is calling the C++ code, without having to specify the name?

Answer 1

对于从EnumWindow获得的与windowName相匹配的每个窗口，您可以检查HWND's进程并选择属于您正在运行的进程的窗口。可以使用GetWindowThreadProcessId函数来完成-它会为您提供该窗口所属进程的PID ，您可以将其与GetCurrentProcessId中的PID进行比较。

Answer 2

You can combine FindWindowEx to enumerate all the windows with the given name (set hwndParent to NULL to use desktop as the parent and just pass the previous result as the hwndChildAfter when you search the second time, and so on) with GetWindowThreadProcessId and GetCurrentProcessId to find out which of the windows belongs the the same thread you are being called from.

But then again - why not just pass the window handle to the dll directly?