For starters: Which version of SciTE4AutoIt3 are you running? Have you tried doing this when your cursor is located on mbb: Edit/Expand abbreviation   (Ctrl+b) When this doesn't work that please provide the output of this script when run from SciTE: Opt("WinSearchChildren", 1) #AutoIt3Wrapper_UseX64=n Global $WM_COPYDATA = 74 ; Get SciTE DirectorHandle $Scite_hwnd = WinGetHandle("DirectorExtension") ; Get My GUI Handle Global $My_Hwnd = GUICreate("