BOOL IsWindowVisible(hWnd)
The IsWindowVisible function returns nonzero anytime an application has made a window visible by using the ShowWindow function (even if the specified window is completely covered by another child or pop-up window, the return value is nonzero).
Parameter | Type/Description |
hWnd | HWND Identifies the window. |
The return value specifies whether or not a given window exists on the screen. It is nonzero if the given window exists on the screen. Otherwise, it is zero.