Determines the opacity used in modality mode.
PRL_RESULT PrlVmCfg_GetModalityOpacity( PRL_HANDLE hVmCfg, PRL_DOUBLE_PTR pdOpacity );
PrlApiVm.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer to buffer was passed.
PRL_ERR_SUCCESS - function completed successfully.