Sorry if I wasn't clear, The query I have is with the commandbarcontrols combobox's, which as far as I can see doesn't have any events, for example commandbar buttons have an on action event to fire a sub when they are presed, I am familiar with
VB. and have used it to creat ddins that use commandbar buttons
eg if you type a font size in the fontsize combobox in excel then click somewhere on the sheet the font is not resized, you need to enter the font size then press enter or tab. to activate the value entered in the combobox