TabControl.GridlineStyleLeft Property (Access)
Gets or sets the width of the bottom gridline for the specified text box. Read/write Byte.
expression A variable that represents a TabControl object.
The BottomGridlineWidth property uses the following settings.
|0||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.|