Re: Readfile hangs while trying to read the response from printer

Hi all,
      Im trying to send a comamnd to the printer and read the
response for it thru parallel port(LPT1:). The write file always
succeeds, but in readfile it goes to hanging state. I have given my
code below.

int g;
 HANDLE h;
 DWORD NumberOfBytesWritten,NumberOfBytesRead;
 unsigned char buff1[12];
 unsigned char buff_read[30];

 h = CreateFile("LPT1:",
                      GENERIC_READ | GENERIC_WRITE,
                      FILE_SHARE_READ,
                      NULL,
                      OPEN_ALWAYS,
                      FILE_ATTRIBUTE_NORMAL |
                      FILE_FLAG_SEQUENTIAL_SCAN,
                      NULL);
 if (h == INVALID_HANDLE_VALUE)
{
  g= 0;
  return 0;
}
 else
 {

 g=1;
  buff1[0] = '{';
  buff1[1] = 'W';
  buff1[2] = 'B';
  buff1[3] = '|';
  buff1[4] = '}';

 i = WriteFile(h,buff1,5,&NumberOfBytesWritten ,NULL);
 i =ReadFile(h,buff_read,2,&NumberOfBytesRead,NULL);
 CloseHandle(h);
 return 400;
}