Some device communicate with both the nine bit protocol as well as standard "8 bit / no parity / 1 stop bit" communications. The best way to accomplish this is to open the port as indicated in the documentation for nine-bit communication and create a function similar to the following to send the 8 bit data.

int WCSCVxDPutPacket8Bit(int VxDPID,int Count, char *Pkt)
{
int OldLCR;
int OldLSR;
int Cnt=Count;
int Idx=0;

//Save the UART's line status register
WCSCVxDGetRegister(VxDPID,LCR,&OldLCR);

//Write new UART's line status register to enable N/8/1
WCSCVxDPutRegister(VxDPID,LCR,0x3);

//Output the data
while(Cnt-- > 0)
	{
	while(1)
		{
		WCSCVxDGetRegister(VxDPID,LSR,&OldLSR);
		if (OldLSR & LSR_THRE)
			{
			WCSCVxDPutRegister(VxDPID,DATABUF,Pkt[Idx++]);
			Cnt--;
			break;
			}
		else
			Sleep(1);
		}
	}
//Restore the UART's line status register
WCSCVxDPutRegister(VxDPID,LCR,OldLCR);

return(Count);
}