Re: *control combobox bugs?

I had a quick look at the code and I understand the issue.    It's actually a problem with the script.  
 

 The AddCtrlListItem requires that the combobox already exist and this does not happen until the bar is shown.  So you need to show the bar before sending this change to the combo box.  (Reason:  internally, the addctrllistitem is implemented by SendMessage to the combobox window).
 

 Here is a working script.  I was impressed by your first script, but I did make a few changes to show other syntax possibilities in case you are not familiar with them .  Of course, it may be that you are and just don't like that syntax!
 

 static TB = cl.create("TestBar", 1)
 local Width = 100
 local Quote = ?+"+    //To declare and set variable in one statement instead of needing local then setstring
 

 TB.Insert(0)
 TB.SetLabel(0, ?%*control combobox dropdown "first|second|third"%)  //Use ?%...% for string with "s
 TB.SetWidth(0, Width)
 TB.SetId(0, "Combo")
 

 local hOK = TB.Insert(0)  // handle directly to button (warning: depends on button number so!!)
 hOK.SetLabel( "OK")
 hOK.SetWidth(Width)
 hOK.AddLeft(cb("@GetInfo"))
 

 

 TB.SetProperties("Format=barsize position: leftcaption vertical")
 TB.Show   // instead of *bar show  or bar.show
 TB.Hide
 

 cl.AddCtrlListItem("TestBar", "combo", "forth", -1)                //doesn't work
 TB.AddCtrlListItem("combo", "fifth")                        //doesn't work
 cl.AddCtrlListItem("TestBar", "combo", Quote ++ "sixth" ++ Quote, -1)        //doesn't work
 TB.AddCtrlListItem("combo", Quote ++ "seventh" ++ Quote, -1)            //doesn't work
 cl.AddCtrlListItem("TestBar", "combo", Quote ++ "eighth" ++ Quote)        //doesn't work
 //TB.ClearCtrlList(0)                            //not tested
 TB.Show
 

 

 quit
 

 Function GetInfo
 win.debug(TB.GetId("Combo"), ": ", TB.GetCtrlValue("Combo"))
 TB.close
 quit