GetParent (Compact 2013)
This function retrieves the handle to the specified child window's parent window.
HWND GetParent( HWND hWnd );
[in] Handle to the window whose parent window handle is to be retrieved.
If the window is a child window, the return value is a handle to the parent window. If the window is a top-level window, the return value is a handle to the owner window. If the window is a top-level unowned window or if the function fails, the return value is NULL. To get extended error information, call GetLastError. For example, this would determine, when the function returns NULL, if the function failed or the window was a top-level window.