The AnyPopup function indicates whether an owned, visible, top-level pop-up, or overlapped window exists on the screen. The function searches the entire Windows screen, not just the calling application’s client area.
AnyPopup is a Windows version 1.x function and is retained for compatibility purposes. It is generally not useful.
BOOL AnyPopup(VOID)
This function has no parameters.
If a pop-up window exists, the return value is nonzero, even if the pop-up window is completely covered by other windows.
If a pop-up window does not exist, the return value is zero.
This function does not detect unowned pop-up windows or windows that do not have the WS_VISIBLE style bit set.