Создать растровое изображение любой размерности WINAPI

void createBITMAP(RECT& client, HDC hdDC, TCHAR* FILENAME)
{
    BITMAPFILEHEADER bmfh;
    LPBITMAPINFO bmi;
    LPVOID Image;
    
    int width = client.right - client.left;
    int height = client.bottom - client.top;
    
    HDC hComDC = CreateCompatibleDC(hdDC);
    HBITMAP hbmp = CreateCompatibleBitmap(hdDC,width,height);
    SelectObject(hComDC,hbmp);
    BitBlt(hComDC,0,0,width,height,hdDC,0,0,SRCCOPY);
    BITMAP bmp;
    GetObject(hbmp,sizeof(BITMAP),&bmp);
 
    WORD ColorSize;
    switch (bmp.bmPlanes*bmp.bmBitsPixel)
    {
    case 1:
    case 4:
    case 8: 
    case 32:
    ColorSize = sizeof(RGBQUAD) * (1 <<( bmp.bmPlanes*bmp.bmBitsPixel)); 
    case 16:
    case 24:
    ColorSize = 0; 
    }
 
    //BITMAPINFOHEADER
    bmi = (LPBITMAPINFO) new BYTE[sizeof(BITMAPINFOHEADER)+ColorSize];
    bmi->bmiHeader.biHeight = bmp.bmHeight;
    bmi->bmiHeader.biWidth = bmp.bmWidth;
    bmi->bmiHeader.biPlanes = 1;
    bmi->bmiHeader.biBitCount = bmp.bmPlanes*bmp.bmBitsPixel;
    bmi->bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
    bmi->bmiHeader.biCompression = 0;
    bmi->bmiHeader.biClrImportant = 0;
    bmi->bmiHeader.biClrUsed = 1 <<( bmp.bmPlanes*bmp.bmBitsPixel);
    bmi->bmiHeader.biSizeImage = ((bmp.bmWidth*bmp.bmPlanes*bmp.bmBitsPixel+31) & ~31)/8*bmp.bmHeight;
    bmi->bmiHeader.biXPelsPerMeter = 0;
    bmi->bmiHeader.biYPelsPerMeter = 0;
    
    //BITMAPFILEHEADER
    bmfh.bfType = 0x4d42;
    bmfh.bfOffBits = sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER)+ColorSize;
    bmfh.bfSize = bmfh.bfOffBits+bmi->bmiHeader.biSizeImage;
    bmfh.bfReserved1 = 0;
    bmfh.bfReserved2 = 0;
 
    Image = (LPVOID) new  BYTE[bmi->bmiHeader.biSizeImage];
    GetDIBits(hDC,hbmp,0,height,Image,bmi,DIB_RGB_COLORS);
 
    DWORD temp;
    HANDLE file = CreateFile(FILENAME,GENERIC_READ | GENERIC_WRITE, 0, NULL,
                             CREATE_ALWAYS,FILE_ATTRIBUTE_NORMAL,NULL);
    WriteFile(file, &bmfh, sizeof(BITMAPFILEHEADER),&temp,NULL);
    WriteFile(file, bmi, sizeof(BITMAPINFOHEADER),&temp,NULL);
    WriteFile(file, Image, bmi->bmiHeader.biSizeImage, &temp,NULL);
    CloseHandle(file);
    delete [] Image;
    //delete bmih;
}