Microsoft released a new hotfix today regarding using a calender control in a RemoteApp. In this scenario, the calendar control opens for a split second and then closes automatically. Therefore, you cannot use the calendar control.
Article ID: 2522743 - Last Review: May 6, 2011 - Revision: 2.0
You cannot use a calendar control in a RemoteApp application when you use the RDC 7.0 client to connect to the RemoteApp application from a computer that is running Windows 7 or Windows Server 2008 R2http://support.microsoft.com/kb/2522743/en-us?sd=rss&spid=14134