Exif規格
http://www.exif.org/specifications.html
方法一:
EXIF Tag Parsing Library Source 範例
http://sourceforge.net/project/showfiles.php?group_id=12272&release_id=132198    方法二:    試試這個範例吧!
資料來源:http://www.smalleranimals.com/isource/isourcesample_v2_2.htm
Get EXIF data from a JPG 
EXIF data is stored in the JPGs created by most digital cameras. It contains information about the camera, the environment when the image was taken, the date, time, etc..     UINT32 w,h,d;    // get the dimensions - we'll we really don't care about the dims. 
// we just want to force a JPG marker read and this is the quickest way
// to do it.
HISSRC hSrc = ISOpenFileSource( pFilename );
ISGetJPGDims( hSrc, &w, &h, &d, NULL);
ISCloseSource( hSrc );    // loop over all JPEG_APPx markers
int ct=ISGetJPGInputMarkerCount();
                               
for (int i=0; i < ct; i++)
{
    // get a JPG marker from ImgSoruce
    HGLOBAL hData = NULL;
    UINT32 len, type;
    ISGetJPGInputMarker(i, &hData, &len, &type);        // only interested in JPEG_APP1 (#225)
    if (type!=225)
    {
        GlobalFree(hData);
        continue;
    }
    else
    {
        // start the EXIF parser
        HGLOBAL hEXIF = ISEXIFInit((BYTE *)hData, len);            if (hEXIF!=NULL)
        {
            // get string with tag ID #271 (camera model)
            // look in all subsections (1 | 2 | 4 | 8 = 15)
            HGLOBAL hStr = NULL;
            UINT32 uStrLen;
            ISEXIFGetString(hEXIF, 272, 15, &hStr, &uStrLen);
            if (hStr!=NULL)
            {
                // got it!
                TRACE("model = %s\n", (char *)hStr);
                GlobalFree(hStr);
            }                                                                  //  try the thumbnail
            HGLOBAL hThumbnail = NULL;
            UINT32 uTNLen = 0;
            if (ISEXIFGetThumbnail(hEXIF, &hThumbnail, &uTNLen)==IS_ERR_OK)
            {
                // there is a thumbnail.                    // what format is it?
                int iFmt = 0;
                HGLOBAL hStr = NULL;
                UINT32 uStrLen;
                ISEXIFGetString(hEXIF, 259, 8, &hStr, &uStrLen);
                if (hStr!=NULL)
                {
                    // got it!
                    TRACE("fmt = %s\n", (char *)hStr);
                    iFmt = atoi((char *)hStr);
                    GlobalFree(hStr);
                }                                                                      if (iFmt==6) // 6 = JPG. 1 = TIFF, 0 = RGB, but most are JPG
                {
                    // convet that to RGB
                    HISSRC hSrc = ISOpenMemorySource((BYTE *)hThumbnail, uTNLen);
                    HGLOBAL hImg = ISReadJPG(hSrc, &w, &h, 24);
                    ISCloseSource(hSrc);                        if (hImg)
                    {
                        // draw it
                        CDC *pDC = GetDC();
                        ISDrawRGB( pDC->m_hDC, (BYTE *)hImg, w, h, 0, 0, w, h, NULL );
                        ReleaseDC(pDC);                            GlobalFree(hImg);
                    }
                }                    // clean up
                GlobalFree(hThumbnail);
            }                // clean up
            ISEXIFDestroy(hEXIF);
        }   
    }        GlobalFree(hData);
}