Call this member function to retrieve the owner window that should be used for dialog boxes or other modal windows.
A pointer to a parent CWnd window. May be NULL.
A pointer to the window that is currently on top. May be NULL.
The safe owner is the first non-child parent window of pParent. If pParent is NULL, the thread's main window (retrieved via AfxGetMainWnd) is used to find an owner.
The framework itself uses this function to determine the correct owner window for dialog boxes and property sheets where the owner is not specified.