When you create control on the Tab by UDF function (_GUICtrlCreate) and not by internal AutoIt's function (GUICtrlCreate) you must show/hide this control yourself. #include <WindowsConstants.au3> #include <ButtonConstants.au3> #include <GUIConstantsEx.au3> #include <IPAddressConstants.au3> #include <TabConstants.au3> #include <GuiIPAddress.au3> #include <GuiTab.au3> #Region ### START Koda GUI section ### Form= $Form1 = GUICreate("Form1", 593, 453,