SpIsChild

This function indicates if a window is a descendant of another window.

Syntax: ischild = spIsChild ( hwnd, hwndParent )

Parameters:
 * hwnd – Window handle of child window.
 * hwndParent – Window handle of parent window.

Returns:
 * True (1) – if child window is a descendant of the parent window, or is equal to it.
 * False (0) – if 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.)