[["... code that's going to be used to make a Vista theme."]] http://www.tcl.tk/man/tcl8.6/TkCmd/ttk_vsapi.htm [MG] The manpage for ttk_vsapi tells you to refer to the Microsoft docs for valid values for ''classname'' and ''partid''. They are always somewhat of a nightmare to navigate (and, sadly, regularly move around), but currently you can find the info http://msdn.microsoft.com/en-us/library/windows/desktop/bb773210%28v=vs.85%29.aspx%|%here%|% on MSDN. ''That'' page tells you to check http://www.ookii.org/misc/vsstyle.h%|%Vsstyle.h%|% which I found online easily with the almightly Google. <> Windows