D3D Render to Desktop（D3D渲染到桌面）

HWND hWnd = ::FindWindow( L"Progman",L"Program Manager");

DWORD dwStyle = ::GetWindowLong( hWnd,GWL_EXSTYLE );

dwStyle |= WS_EX_LAYERED;

::SetWindowLong( hWnd,GWL_EXSTYLE,dwStyle );

::SetLayeredWindowAttributes( hWnd,0,127,LWA_ALPHA );

InitD3D( hDesktop );

InitGeometry(); 

RenderLoop();