expression.AllowInsertingColumns
expression Required. An expression that returns a Protection object.
Remarks
An inserted column inherits its formatting (by default) from the column to its left, which means that it may have locked cells. In other words, users may not be able to delete columns that they have inserted.
The AllowInsertingColumns property can be set by using the Protect method arguments.
Example
This example allows the user to insert columns on the protected worksheet and notifies the user.
Sub ProtectionOptions()
ActiveSheet.Unprotect
' Allow columns to be inserted on a protected worksheet.
If ActiveSheet.Protection.AllowInsertingColumns = False Then
ActiveSheet.Protect AllowInsertingColumns:=True
End If
MsgBox "Columns can be inserted on this protected worksheet."
End Sub