APP.SendMessage

status = APP.SendMessage( nWindow      AS INTEGER,

                         nMessage     AS INTEGER,

                        [wParam       AS INTEGER=0],

                        [lParam       AS INTEGER=0],

                        [bSendToDesc  AS INTEGER=FALSE] ) AS INTEGER

This is a low level Windows interface used to send Windows messages to the specified nWindow retrieved by App.GetWindow().

The last parameter, bSendToDesc, allows you to have the message to be sent to all the Descendants of the specified window.