Form.SelectionChange property (Access)
Returns or sets a String indicating which macro, event procedure, or user-defined function runs when the SelectionChange event occurs. Read/write.
expression A variable that represents a Form object.
Valid values for this property are "macroname" where macroname is the name of macro, "[Event Procedure]" which indicates the event procedure associated with the BeforeInsert event for the specified object, or "=functionname()" where functionname is the name of a user-defined function.
The following example specifies that when the SelectionChange event occurs on the first form of the current project, the associated event procedure should run.
Forms(0).SelectionChange = "[Event Procedure]"