Returns width of the specified screen resolution.
PRL_RESULT PrlScrRes_GetWidth( PRL_HANDLE hVmScrRes, PRL_UINT32_PTR pnWidth );
PrlApiVm.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_SUCCESS - function completed successfully.