以Argox条码机的PPLB为例，下面是相关的函数调用及打印代码：

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Text;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace C5_Test
{
    public partial class Form1 : Form
    {
        [DllImport("Winpplb.dll")]
        private static extern int B_Bar2d_Maxi(int x, int y, int cl, int cc, int pc, string data);
        [DllImport("Winpplb.dll")]
        private static extern int B_Bar2d_PDF417(int x, int y, int w, int v, int s, int c, int px, int py, int r, int l, int t, int o, string data);
        [DllImport("Winpplb.dll")]
        private static extern int B_Bar2d_PDF417_N(int x, int y, int w, string para, string data);
        [DllImport("Winpplb.dll")]
        private static extern void B_ClosePrn();
        [DllImport("Winpplb.dll")]
        private static extern int B_CreatePrn(int selection, string filename); 
        [DllImport("Winpplb.dll")]
        private static extern int B_Del_Form(string formname);
        [DllImport("Winpplb.dll")]
        private static extern int B_Del_Pcx(string pcxname);
        [DllImport("Winpplb.dll")]
        private static extern int B_Draw_Box(int x, int y, int thickness, int hor_dots, int ver_dots);
        [DllImport("Winpplb.dll")]
        private static extern int B_Draw_Line(char mode, int x, int y, int hor_dots,  int ver_dots);
        [DllImport("Winpplb.dll")]
        private static extern int B_Error_Reporting(char option);
        [DllImport("Winpplb.dll")]
        private static extern int B_Get_DLL_VersionA(int nShowMessage);
        [DllImport("Winpplb.dll")]
        private static extern int B_Get_Graphic_ColorBMP(int x, int y, string filename);
        [DllImport("Winpplb.dll")]
        private static extern int B_Get_Pcx(int x, int y, string filename);
        [DllImport("Winpplb.dll")]
        private static extern int B_Initial_Setting(int Type, string Source);
        [DllImport("Winpplb.dll")]
        private static extern int B_Load_Pcx(int x, int y, string pcxname);
        [DllImport("Winpplb.dll")]
        private static extern int B_Open_ChineseFont(string path);
        [DllImport("Winpplb.dll")]
        private static extern int B_Print_Form(int labset, int copies, string form_out, string var);
        [DllImport("Winpplb.dll")]
        private static extern int B_Print_MCopy(int labset, int copies);
        [DllImport("Winpplb.dll")]
        private static extern int B_Print_Out(int labset);
        [DllImport("Winpplb.dll")]
        private static extern int B_Prn_Barcode(int x, int y, int ori, string type, int narrow, int width, int height, char human, string data);
        [DllImport("Winpplb.dll")]
        private static extern void B_Prn_Configuration();
        [DllImport("Winpplb.dll")]
        private static extern int B_Prn_Text(int x, int y, int ori, int font, int hor_factor, int ver_factor, char mode, string data);
        [DllImport("Winpplb.dll")]
        private static extern int B_Prn_Text_Chinese(int x, int y, int fonttype, string id_name, string data);
        [DllImport("Winpplb.dll")]
        private static extern int B_Prn_Text_TrueType(int x, int y, int FSize, string FType, int Fspin, int FWeight, int FItalic,
                                        int FUnline, int FStrikeOut, string id_name, string data);
        [DllImport("Winpplb.dll")]
        private static extern int B_Prn_Text_TrueType_W(int x, int y, int FHeight, int FWidth, string FType, int Fspin, int FWeight,
                                          int FItalic, int FUnline, int FStrikeOut, string id_name, string data);
        [DllImport("Winpplb.dll")]
        private static extern int B_Select_Option(int option);
        [DllImport("Winpplb.dll")]
        private static extern int B_Select_Symbol(int num_bit, int symbol, int country);
        [DllImport("Winpplb.dll")]
        private static extern int B_Set_Backfeed(char option);
        [DllImport("Winpplb.dll")]
        private static extern int B_Set_BMPSave(int nSave, string strBMPFName);
        [DllImport("Winpplb.dll")]
        private static extern int B_Set_Darkness(int darkness);
        [DllImport("Winpplb.dll")]
        private static extern int B_Set_DebugDialog(int nEnable);
        [DllImport("Winpplb.dll")]
        private static extern int B_Set_Direction(char direction);
        [DllImport("Winpplb.dll")]
        private static extern int B_Set_Form(string formfile);
        [DllImport("Winpplb.dll")]
        private static extern int B_Set_Labgap(int lablength, int gaplength);
        [DllImport("Winpplb.dll")]
        private static extern int B_Set_Labwidth(int labwidth);
        [DllImport("Winpplb.dll")]
        private static extern int B_Set_Originpoint(int hor, int ver);
        [DllImport("Winpplb.dll")]
        private static extern int B_Set_Prncomport(int baud, char parity, int data, int stop);
        [DllImport("Winpplb.dll")]
        private static extern int B_Set_Prncomport_PC(int nBaudRate, int nByteSize, int nParity, int nStopBits, int nDsr, int nCts, int nXonXoff);
        [DllImport("Winpplb.dll")]
        private static extern int B_Set_Speed(int speed);
        [DllImport("Winpplb.dll")]
        private static extern int B_Set_ProcessDlg(int nShow);
        [DllImport("Winpplb.dll")]
        private static extern int B_GetUSBBufferLen();
        [DllImport("Winpplb.dll")]
        private static extern int B_EnumUSB(byte[] buf);
        [DllImport("Winpplb.dll")]
        private static extern int B_CreateUSBPort(int nPort);
        [DllImport("Winpplb.dll")]
        private static extern int B_ResetPrinter();
        [DllImport("Winpplb.dll")]
        private static extern int B_GetPrinterResponse(string pbuf, int nMax);
        [DllImport("Winpplb.dll")]
        private static extern int B_TFeedMode(int nMode);
        [DllImport("Winpplb.dll")]
        private static extern int B_TFeedTest();
        [DllImport("Winpplb.dll")]
        private static extern int B_CreatePort(int nPortType, int nPort, string filename);
        [DllImport("Winpplb.dll")]
        private static extern int B_Execute_Form(string form_out, string var);

        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            //PPLBDLL Test code start
            B_CreatePrn(0, null);

            // USB Port Open
            /*int nUSBDataLen;
            byte[] pbuf;

            nUSBDataLen = B_GetUSBBufferLen()+1;
            pbuf = new byte[nUSBDataLen];
            B_EnumUSB(pbuf);
            B_CreateUSBPort(1);*/

            // Open com3
            //B_CreatePort(1, 3, null);

            //B_Set_Darkness(8);
            //B_Select_Option(1);
            //B_Set_Labgap(50,24);
            //B_Set_Labwidth(816);
            //B_Set_Speed(2);
            //B_Error_Reporting('S');

            B_Prn_Text(100, 200, 0, 3, 1, 1, 'N', "FONT 3");    //Get a text string.
            // B_Prn_Text(200,10,1,3,1,1,'N',"Text 3<+1>");

            B_Prn_Barcode(20, 20, 0, "1", 3, 3, 75, 'B', "079-305"); //Get a bar code.
            //Get a PDF-417 2D bar code.
            //B_Bar2d_PDF417(50, 150, 400, 300, 0, 0, 3, 7, 10, 2, 0, 0, "ARGOXINFO");
            //Get a Maxi Code 2D bar code.
            B_Bar2d_Maxi(400, 10, 300, 400, 93065, "This MaxiCode");

            B_Draw_Line('E', 380, 200, 100, 10);  //Line Draw by Exclusive or operation.
            //B_Draw_Line('O', 400, 180, 10, 100);  //Line draw by or operation.
            //B_Draw_Line('W', 380, 220, 100, 10); //Draw white line.
            //B_Draw_Line('E', 450, 180, 20, 110);  //Line Draw by Exclusive or operation.

            //B_Draw_Box(0, 0, 5, 815, 300);     //Draw a box.

            // B_Get_Pcx(50,55,"phone.pcx"); //Print Graphics of .PCX.
            //B_Get_Pcx(400,0,"test1.pcx");
            B_Prn_Text_TrueType(450, 20, 40, "Times New Roman", 1, 400, 0, 0, 0, "AA", "Library Test");
            // Get a truetype text
            //B_Prn_Text_TrueType(30,50,20,"Arial",4,400,0,0,0,"AB","TrueType Font");

            B_Print_Out(1);

            B_ClosePrn();
            //PPLBDLL Test code end
        }
    }
}