Structure Versions Must be Initialized

Each structure contains a version field which the caller must initialize so that the API library can track the version that is used by the calling application.
Each structure also has an associated NvAPI macro that you can use to initialize the version field. For example, the macro for structure NV_XXX is NV_XXX_VER. Initialize the version field as follows:

NV_XXX.version = NV_XXX_VER;