Attachment.BorderColor Property (Access)
You can use the BorderColor property to specify the color of a control's border. Read/write Long.
The BorderColor property setting is a numeric expression that corresponds to the color you want to use for a control's border.
You can set the default for this property by using a control's default control style or the DefaultControl property in Visual Basic.
A control's border color is visible only when its SpecialEffect property is set to Flat or Shadowed. If the SpecialEffect property is set to something other than Flat or Shadowed, setting the BorderColor property changes the SpecialEffect property setting to Flat.