如何控制串口打印机实现打印等操作？

Question

有谁用VC编写过串口打印机程序，最好有源码，请教高手，谢了

Answer 1

复制上去，再定义一些变量，就好了。void OpenCom(void)
{
HRESULT fSuccess;
hCom=CreateFile(portcom,GENERIC_READ|GENERIC_WRITE,0,NULL,OPEN_EXISTING,0,NULL);
if(hCom==INVALID_HANDLE_VALUE)
{
MessageBox(NULL,"SetCommTimeout error","Error",MB_OK);
dwError=GetLastError();
}
//超时设置
GetCommTimeouts(hCom,&cto);
cto.ReadIntervalTimeout=0;
cto.ReadTotalTimeoutConstant=20;
cto.ReadTotalTimeoutMultiplier=20;
cto.WriteTotalTimeoutConstant=0;
cto.WriteTotalTimeoutMultiplier=0;
SetCommTimeouts(hCom,&cto);     FillMemory(&dcb,sizeof(dcb),0);
dcb.DCBlength=sizeof(dcb);
fSuccess=GetCommState(hCom,&dcb);

dcb.BaudRate=pt;//CBR_9600;
dcb.Parity=NOPARITY;
dcb.ByteSize=sj;
dcb.StopBits=(tz-1);//ONESTOPBIT;
dcb.fDtrControl=DTR_CONTROL_ENABLE;
dcb.wReserved=0;
fSuccess=SetCommState(hCom,&dcb);
}
如chfonts=“printer\n”;
WriteFile(hCom,chfonts,(sizeof(chfonts)-1),&dwBytesWritten,NULL);
用了就关上CloseHandle(hCom);