bitmap writing.. writes bmps ACDSee cannot read by dextre

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void FileBmp::saveBmp(std::string filename, long *data, int width, int height) {     if (FILE *stream = fopen(filename.c_str(), "wb"))     {         //=========================================================         long headerSize = sizeof(BITMAPFILEHEADER) + sizeof(BITMAPINFOHEADER);         long pixelCnt = width * height;         long dataSize = pixelCnt * sizeof(RGBTRIPLE);         int bitCount = 24;         long padding = calcPadding(width, bitCount);         //=========================================================         BITMAPFILEHEADER bmfHeader;         memset(&bmfHeader, 0, sizeof(BITMAPFILEHEADER));         bmfHeader.bfSize = headerSize + dataSize;         bmfHeader.bfType = BF_TYPE;         bmfHeader.bfOffBits = headerSize;         fwrite(&bmfHeader, sizeof(BITMAPFILEHEADER), 1, stream);         //=========================================================         BITMAPINFOHEADER bmiHeader;         memset(&bmiHeader, 0, sizeof(BITMAPINFOHEADER));         bmiHeader.biSize = sizeof(BITMAPINFOHEADER);         bmiHeader.biWidth = width;         bmiHeader.biHeight = height;         bmiHeader.biPlanes = 1;         bmiHeader.biBitCount = bitCount;         bmiHeader.biCompression = BI_RGB;         bmiHeader.biSizeImage = dataSize;         fwrite(&bmiHeader, sizeof(BITMAPINFOHEADER), 1, stream);         //=========================================================         RGBTRIPLE *pixel = new RGBTRIPLE[pixelCnt];         for (int i = 0; i < pixelCnt; i++)         {             long c = data[i];             pixel[i].rgbtRed = getR(c);             pixel[i].rgbtGreen = getG(c);             pixel[i].rgbtBlue = getB(c);         }         for (int j = 0; j < height; j++)         {             fwrite(&(pixel[j * width]), sizeof(RGBTRIPLE), width, stream);             fseek(stream, padding, SEEK_CUR);         }         fclose(stream);     } }