A few quick searched yielded no results, so...   This sets the width of the tabs for a tab control according to the gui width. Additionally, it can control min/max gui size.   One benefit of this is, if you have a custom background color for your gui, you no longer have to do something 'sneaky' like adding a colored label to cover that unsightly gray area of the tab control. This was updated to address the bug that @funkey found #Region ;**** Directives created by AutoIt3Wrapper_GUI ****