C/C++ Sample Code

#define _UNICODE

#include <windows.h>
#include <wchar.h>
#include "tbarcode.h"

// Windows DLL builds do not require BCInitLibrary().
// Static-library builds must call BCInitLibrary() before using the API.

ERRCODE GenerateBarcode(HDC hPrinterDC, LONG xPos, LONG yPos)
{
    ERRCODE eCode = ErrOk;
    t_BarCode* pBC = NULL;
    LPBYTE imageBuffer = NULL;
    const wchar_t* demo = L"12345678";

    // Apply the product license.
    eCode = BCLicenseMe(L"LicenseeName", eLicKindDeveloper, 1,
                        L"LicenseKey", eLicProd2D);
    if (eCode != ErrOk)
        goto cleanup;

    // Allocate the barcode structure.
    eCode = BCAlloc(&pBC);
    if (eCode != ErrOk)
        goto cleanup;

    // Select the symbology and configure the human-readable text.
    eCode = BCSetBCType(pBC, eBC_Code128);
    if (eCode != ErrOk)
        goto cleanup;

    eCode = BCSetFontHeight(pBC, 14);
    if (eCode != ErrOk)
        goto cleanup;

    // Set the barcode data after all properties that affect its interpretation.
    eCode = BCSetText(pBC, demo, (LONG)wcslen(demo));
    if (eCode != ErrOk)
        goto cleanup;

    // Optionally validate the data before creating the barcode.
    eCode = BCCheck(pBC);
    if (eCode != ErrOk)
        goto cleanup;

    // Create the internal barcode representation.
    eCode = BCCreate(pBC);
    if (eCode != ErrOk)
        goto cleanup;

    // Draw to a Windows device context. Hi-Metric units are 0.01 mm.
    {
        RECT rect = {0, 3000, 5000, 0}; // 50 x 30 mm
        INT savedDC = SaveDC(hPrinterDC);
        SetMapMode(hPrinterDC, MM_HIMETRIC);
        OffsetRect(&rect, xPos, yPos);
        eCode = BCDraw(pBC, hPrinterDC, &rect);
        RestoreDC(hPrinterDC, savedDC);
    }
    if (eCode != ErrOk)
        goto cleanup;

    // Save to an EPS file. Vector-output dimensions use 0.001 mm.
    eCode = BCSaveImage(pBC, L"barcode.eps", eIMEps,
                        50000, 30000, 0, 0);
    if (eCode != ErrOk)
        goto cleanup;

    // Save a JPG to a memory buffer. Bitmap dimensions use pixels.
    eCode = BCSaveImageToBuffer(pBC, &imageBuffer, eIMJpg,
                                (LONG)(2 * BCGetCountModules(pBC)),
                                100, 96, 96);

cleanup:
    if (imageBuffer != NULL)
        GlobalFree((HGLOBAL)imageBuffer);
    if (pBC != NULL)
        BCFree(pBC);
    return eCode;
}

// Windows DLL builds do not require BCDeInitLibrary().
// Static-library builds must call BCDeInitLibrary() before the application exits.