BCGControlBar Pro for MFC
UINT BCGP_PLANNER_REMOVE_APPOINTMENT

The message is sent to the parent of CBCGPPlannerManagerCtrl when an appointment has been removed from the Planner Control.

Parameters
wParamthis parameter is not used.
lParama pointer to the removed appointment.
Returns
-1L - cancel delete, 0L - delete single appointment or only occurrence of the series, 1L - delete full series.