The WM_ENTERMENULOOP message informs an application's main window procedure that a menu modal loop has been entered.
WM_ENTERMENULOOP
wParam = (BOOL) fIsTrackPopupMenu // flags a shortcut menu
lParam = 0 ; // not used; must be zero
Parameters
fIsTrackPopupMenu
Specifies whether the menu involved is a shortcut menu. This parameter has a value of TRUE if it is a shortcut menu, FALSE if it isn't.
Return Values
An application should return zero if it processes this message.
Remarks
The DefWindowProc function returns zero.
See Also