QueryUnloadConstants

Reason codes reported in the UnloadMode argument of a form’s QueryUnload event, identifying what triggered the unload.

Constant	Value	Description
vbFormControlMenu	0	The user clicked the form’s Close button (or selected Close from its system menu).
vbFormCode	1	The unload was initiated by code calling Unload.
vbAppWindows	2	Windows is shutting down.
vbAppTaskManager	3	The application is being closed by Task Manager.
vbFormMDIForm	4	The MDI parent form is being unloaded.
vbFormOwner	5	The owner form is being unloaded.