Unlocks the virtual machine screen buffer that was previously locked with the PrlDevDisplay_LockForRead function call.
PRL_RESULT PrlDevDisplay_Unlock( PRL_HANDLE hObj );
PrlApiVm.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_SUCCESS - function completed successfully.
