VCOMM_PM_API_cextnfcn

include vcomm.inc

mov     ebx, hPort
mov     cx, func
mov     ax, VCOMM_PM_API_cextnfcn
call    [_VCOMMCallAddr]

Calls the _VCOMM_EscapeCommFunction service. Uses AX and DX.

• Returns a function-specific 32-bit value in AX:DX (low word in AX).

hPort

Communications resource handle.

func

Function to carry out.

VCOMM assumes zero for the InData parameter and NULL for the OutData parameter for _VCOMM_EscapeCommFunction.

See also _VCOMM_EscapeCommFunction