I have a .NET application and have added handwriting (via the PenInputPanel class) for users with Tablet PCs. The problem I'm having is that if I call this class it throws a runtime error if the application is not on a Tablet PC.

My question is how do I detect if it is a Tablet PC? I checked the OS and they are identical (i.e. 5.1.2600 Service Pack 2) between a TabletPC and non Tablet PC.

Thanks
Eric