AT_ERRCOUNT ACCUAPI IG_IP_area_info_get(
   HIGEAR hIGear,
   const LPAT_RECT lpRect,
   HIGPIXEL lpPixel,
   AT_MODE nChannel,
   AT_MODE nInfo
);

HIGEAR hIGear;            // HIGEAR handle of image
AT_ERRCOUNT nErrcount;    // Count of errs on stack upon ret from func
AT_INT channelCount;    // Count of channels in the image
AT_INT bitsPerChannel;    // Channel depth
HIGPIXEL hPixel;

// Load image file "picture.bmp" from working directory
nErrcount = IG_load_file("picture.bmp", &hIGear);
if(nErrcount == 0)
{
    // Set IG_PIX_ACCESS_MODE_NEW access mode
    AT_LMODE AccessMode = IG_PIX_ACCESS_MODE_NEW;
    IG_gctrl_item_set("DIB.PIX_ACCESS_USE_LEGACY_MODE", AM_TID_AT_LMODE, &AccessMode, sizeof(AT_LMODE), NULL);

    IG_image_channel_count_get(hIGear, &channelCount);
    IG_image_channel_depth_get(hIGear, 0, &bitsPerChannel);

    hPixel = IG_pixel_create(channelCount, bitsPerChannel);
    if(hPixel != NULL)
    {
        // Get average pixel value
        nErrcount = IG_IP_area_info_get(hIGear, NULL, hPixel, IG_COLOR_COMP_ALL, IG_DIB_AREA_INFO_AVE);
        // ...
        // Delete pixel
        IG_pixel_delete(hPixel);
    }
    // Destroy the image
    IG_image_delete(hIGear);
}