Private Sub expression_BeforeMaximize(Cancel As Boolean)
expression An expression that returns an object in the Applies To list declared with events in a class module.
Cancel Required Boolean. False when the event occurs. If the event procedure sets this argument to True, the operation is not completed and the explorer or inspector is not maximized.
Example
The following Microsoft Visual Basic/Visual Basic for Applications (VBA) example prompts the user with a warning message before maximizing the current window. If the user clicks Yes, the explorer will maximize. The sample code must be placed in a class module such as ThisOutlookSession, and the Initialize_Handler() subroutine should be called before the event procedure can be called by Microsoft Outlook.
Public WithEvents myOlExp As Outlook.Explorer
Sub Initalize_Handler()
Set myOlExp = Application.ActiveExplorer
End Sub
Private Sub myOlExp_BeforeMaximize(Cancel As Boolean)
'Prompts the user before maximizing the explorer
Dim lngAns As Long
lngAns = MsgBox("Are you sure you want to maximize the current window?", vbYesNo)
If lngAns = vbYes Then
Cancel = False
Else
Cancel = True
End If
End Sub