Is there any tutorial for using the DialogLauncher with a ribbon group? Specifically, I'd like to find out how to set it up and what event to look at when it's clicked.
To use the dialog launcher for a group, define a button tool in the toolbars manager. Then set the DialogBoxLauncherKey property of a RibbonGroup to the key of the button tool. When the dialog launcher is clicked, the ToolClick event will be fired as if the button tool had been clicked. The following help article describes this in more detail:
http://help.infragistics.com/Help/NetAdvantage/NET/2008.1/CLR2.0/html/WinToolbarsManager_Use_the_DialogBoxLauncher_Button_to_Display_a_Dialog_Box.html
Clicking that link gives me "Server Error in '/' Application."