_VCOMM_GetCommQueueStatus

include vcomm.inc

VxDcall _VCOMM_GetCommQueueStatus, <hPort, <OFFSET32 cmst>>
or      eax, eax
jz      error_handler

Retrieves information about the status of a communications channel and the amount of data in the receive and transmit queues. Uses the C calling convention. This is an asynchronous service.

• Returns TRUE if successful, FALSE otherwise. For extended error information, use _VCOMM_GetLastError.

hPort

Handle of a communications resource.

cmst

Address of a _COMSTAT structure that receives status information.

See also _COMSTAT, _VCOMM_GetLastError