_VCOMM_GetModemStatus

include vcomm.inc

VxDCall _VCOMM_GetModemStatus, <hPort, <OFFSET32 dwModemStatus>>
or      eax, eax
jz      error_handler
 

Retrieves the current value of the modem-status register. 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.

dwModemStatus

Address of a 32-bit variable to receive the modem status. This can be a combination of the following values:

Value	Meaning
MS_CTS_ON	CTS is on.
MS_RING_ON	Ring indicator is on.
MS_RLDS_ON	RLSD is on.
MS_DSR_ON	DSR is on.

See Also

_VCOMM_GetLastError