How can I access Parallel Port through a printer to print RF

Using CreateFile and WriteFile from win32 api: [DllImport( " kernel32.dll " )] private static extern int CreateFile( string lpFileName, uint dwDesiredAccess, int dwShareMode, int lpSecurityAttributes, int dwCreationDisposition, int dwFlags

Using CreateFile and WriteFile from win32 api:

[DllImport("kernel32.dll ")]
private static extern int CreateFile(
    string lpFileName,
    uint dwDesiredAccess,
    int dwShareMode,
    int lpSecurityAttributes,
    int dwCreationDisposition,
    int dwFlagsAndAttributes,
    int hTemplateFile);

[DllImport("kernel32.dll ")]
privatestaticextern bool WriteFile(
    int hFile,
    byte[] lpBuffer,
    int nNumberOfBytesToWrite,
    ref int lpNumberOfBytesWritten,
    ref   OVERLAPPED lpOverlapped
  );
iHandle =CreateFile("lpt1 ",0x40000000,0,0,3,0,0);

byte[] mybyte =System.Text.Encoding.Default.GetBytes(Mystring);
bool b =WriteFile(iHandle, mybyte, mybyte.Length,ref   i,ref   x);

It can transport barcode command and print barcode well, but it can not read the status from the parallel port.