HowcanIaccessParallelPortthroughaprintertoprintRF

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.