1     class Printer
 2     {
 3         [DllImport("kernel32.dll", CharSet = CharSet.Auto)]
 4         private static extern SafeFileHandle CreateFile(string lpFileName, int dwDesiredAccess, int dwShareMode,
 5                int lpSecurityAttributes, int dwCreationDisposition, int dwFlagsAndAttributes, int hTemplateFile);
 6 
12         public static bool PrintLPT(string ZPL)
13         {
14             SafeFileHandle iHandle = CreateFile("LPT1", 0x40000000, 0, 0, 3, 0, 0);
15 
16             if (!iHandle.IsInvalid)
17             {
18                 FileStream fs = new FileStream(iHandle, FileAccess.ReadWrite);
19                 StreamWriter sw = new StreamWriter(fs, Encoding.Default);
20                 sw.WriteLine(ZPL);
21                 sw.Close();
22                 fs.Close();
23                 return true;
24             }
25             else
26             {
27                 return false;
28             }
29         }
30 　　}