WinIsChild - Parameters

hwnd (HWND) - input

Child-window handle.

hwndParent (HWND) - input

Parent-window handle.

fRelated (BOOL) - returns

Related indicator.

TRUE

Child window is a descendant of the parent window, or is equal to it
FALSE
Child window is not a descendant of the parent, or is an Object Window (even if hwndParent is specified as the desktop or HWND_DESKTOP), or an error occurred.

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