must be missing something here ...
mdi app, child form loaded, combo box tool in a ribbon - pressing tab results in navigation to another window ...
tried intercepting the key presses - eg ToolKeyPress but not getting handled ...
any ideas?
I've replicated the behaviour using a new project ...
1) new windows app
2) add mdi form
3) add two child mdi forms
4) ribbons on each .. diff. name - merging
5) combo box (dropdown ) on 3rd form
6) buttons on mdi to open frm2 / frm3 and set mdi parent
tab off combo navigates to mdi ribbon
This sounds like it may be a bug. I would recommend submitting it to the support group: http://ko.infragistics.com/gethelp.