TabControl.GridlineWidthTop Property (Access)
Gets or sets the width of the top gridline for the specified text box. Read/write Byte.
Version Added: Access 2010
A variable that represents a TabControl object.
The TopGridlineWidth property uses the following settings.
Hairline. This is the narrowest border possible on your system.
1 to 6
The width as indicated in points. The default setting is 1 point.