Returns the primary display screen size of the specified virtual machine.
PRL_RESULT PrlDevDisplay_GetScreenSize( PRL_HANDLE hObj, PRL_IO_SCREEN_SIZE_PTR size );
PrlApiVm.h
PRL_RESULT. Possible values:
PRL_ERR_INVALID_ARG - invalid handle or null pointer was passed.
PRL_ERR_SUCCESS - function completed successfully.