Dear Support:
Our application requires the display driver model WDDM, and currently and more importantly, version 1.1 or higher. Version 1.0 is not sufficient. Despite a rather extensive search of forums and documentation, we cannot determine this information by what we believe must be a straightforward programmatic method, e.g., via an API. DXDiag determines this which is what we use to verify manually a system.
Essentially, we wish to test for WDDM 1.1 or higher via a WiX custom action at the time of installation or at the time of application start.
Thank you in advance for your help,
Marcus GABRIEL