How can I extend the webscheduleinfo and define a new replacement string tag so that I can show custom data in the appointmentformatstring ?
It has been some time since your post but in case that you still need assistance I will be happy to help.
I suggest that you take a look at the following thread about custom format tags - http://forums.infragistics.com/forums/p/23469/86342.aspx.
Please let me know if you have any further questions.
If you need any further assistance on the matter please do not hesitate to ask.