Sets the virtual machine "Coherence Button visibility" option.
PRL_RESULT PrlVmCfg_SetCoherenceButtonVisibility( PRL_HANDLE hVmCfg, PRL_BOOL bVmCoherenceButtonVisibility );
PrlApiVm.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_SUCCESS - function completed successfully.