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Loading a User-Mode Display Driver

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You must set the following entry in an add-registry section of the INF file so that the user-mode display driver's DLL name is added to the registry during driver installation and so that the Microsoft Direct3D runtime can subsequently load the DLL:

[Xxx_SoftwareDeviceSettings]
...
HKR,, UserModeDriverName,    %REG_MULTI_SZ%, Xxx.dll

The INF file must contain information to direct the operating system to copy the user-mode display driver into the system's %systemroot%\system32 directory. For more information, see INF CopyFiles Directive and INF DestinationDirs Section.

The Direct3D runtime obtains the user-mode display driver's DLL name from the registry in order to load the user-mode display driver in the runtime's process space.