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How do I know if HWND is desktop itself?

I use GetForegroundWindow to get the foreground window handle but if there is no window, then it returns the HWND to the desktop. How do I know if the HWND is the desktop?

将它与调用GetDesktopWindow ()的结果进行比较。

将句柄与GetDesktopWindow()返回的句柄进行比较。

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