C / C++ / MFC

//in header file
LONG		DIBSecWidth;
LONG		DIBSecHeight;
LONG		BitsPerPixel;
LONG		Stride;
BITMAPINFO	bmi;
BYTE		*pDIBSectionBits;
HBITMAP		hbm;

//in cpp file
DIBSecWidth  = 512;
DIBSecHeight = 512; 
BitsPerPixel = 24;
m_bData = VBI_vector(row*col);
Stride = ((DIBSecWidth * BitsPerPixel + 31L) & (~31L)) / 8L;	
memset(&bmi, 0, sizeof(BITMAPINFO));
bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
bmi.bmiHeader.biWidth = DIBSecWidth;
bmi.bmiHeader.biHeight = DIBSecHeight;
bmi.bmiHeader.biPlanes = 1;
bmi.bmiHeader.biBitCount = (WORD)BitsPerPixel;
bmi.bmiHeader.biCompression = BI_RGB;
bmi.bmiHeader.biSizeImage = Stride * abs(DIBSecHeight);
hbm = ::CreateDIBSection(NULL, &bmi, DIB_RGB_COLORS, (void**)&pDIBSectionBits, NULL, 0);
memDC.CreateCompatibleDC(NULL);
//colormap
colormap = new COLORREF[256];
int red, blue, green;
for (int i=1; i<257; ++i)
{
	red = (int)(((1+cos((4*PI*double(i))/(3*255)))/2)*255);
	green = (int)(((1+cos((4*PI*double(i)/(3*255))-(2*PI/3)))/2)*255);
	blue = (int)(((1+cos((4*PI*double(i)/(3*255))-(4*PI/3)))/2)*255);
	colormap[256-i] = RGB(red,green,blue);
}
//on paint()

CDC *dc = Display->GetDC();
HGDIOBJ holdbm;
BYTE color;	
short idx;
RGBTRIPLE *pCurRowPixel = (RGBTRIPLE *)(pDIBSectionBits);
short i=-1;
for (int y = 0; y < 512; ++y)
{
	for (int x = 0; x < 512; ++x)
	{
		color = (BYTE) m_dDatatemp[++i];
		pCurRowPixel[x].rgbtBlue = GetBValue(colormap[color]);
		pCurRowPixel[x].rgbtGreen = GetGValue(colormap[color]);
		pCurRowPixel[x].rgbtRed = GetRValue(colormap[color]);
	}
	pCurRowPixel = (RGBTRIPLE *)((BYTE*)pCurRowPixel + Stride);
}	
holdbm = memDC.SelectObject(hbm);
dc->BitBlt(align_left, align_top, bmi.bmiHeader.biWidth, bmi.bmiHeader.biHeight,&memDC,0,0,SRCCOPY);
memDC.SelectObject(holdbm);		
ReleaseDC(dc);