[DC's] - how can i create an empty DC with window size?

[Cambalinho]

struct ImageInfo
{    
    HBITMAP ImageImage;
    BITMAP Imagebm;
    HDC ImagehdcMem;
    HBITMAP ImageMaskImage;
    BITMAP ImageMaskbm;
    HDC ImageMaskhdcMem;
};

//...................
ImageInfo DoubleBuffer;
DoubleBuffer.ImagehdcMem  = CreateCompatibleDC (Console.WindowDC);//Console.WindowDC is window DC        
DoubleBuffer.ImageImage   = CreateCompatibleBitmap (Console.WindowDC,rec.right-rec.left ,  rec.bottom-rec.top); //rec is the window RECT
SelectObject (Console.WindowDC , Console.WindowHandle); //Console.WindowHandle is the window handle
TextOut(DoubleBuffer.ImagehdcMem,10,10, "Hello world",strlen("Hello world"));
BitBlt(Console.WindowDC,0,0,DoubleBuffer.Imagebm.bmWidth  , DoubleBuffer.Imagebm.bmHeight ,DoubleBuffer.ImagehdcMem,0,0,SRCCOPY);     
system("pause");

why the text isn't show in window after use BitBlt()?