Occurs when the user selects the menu or toolbar Page Settings - Mirror Vertical.
Syntax
Visual Basic
Public Event OnImageMirrorVerticalStart()
Remarks
When the user clicks on the menu or toolbar button for Page Settings - Mirror Vertical, it will
first generate the "OnImageMirrorVerticalStart" event, perform the mirror vertical operation,
then generate the "OnImageMirrorVerticalFinish" event.
