UINT BCGP_PLANNER_BEFORE_UPDATE_APPOINTMENT

Sent by the framework before an appointment has been updated.

Parameters

wParam	This parameter is not used.
lParam	a pointer to appointment to be updated.

Returns

the application should return non-zero if update should be canceled.

The BCGP_PLANNER_BEFORE_UPDATE_APPOINTMENT is sent to the parent of planner control before an appointment has been updated.