VCOMM_PM_API_ReadString

include vcomm.inc

mov     ax, VCOMM_PM_API_ReadString  ;function number
mov     ebx, hPort
les     dx, buf
mov     cx, cnt
mov     si, es            ;address of buffer in si:dx
les     di, res           ;address to receive count in es:di
call    [_VCOMMCallAddr]

Calls the _VCOMM_ReadComm service.

Returns zero in AX if successful, or an error value otherwise.

hPort

Communications resource handle.

buf

Address of buffer that receives the data.

cnt

Number of characters to read.

res

Address of a 32-bit variable that receives the number of characters read.