The simplest example of D3D

The simplest of D3D Example  //=============================================================================//DESC: Simplest Direct3D program,/// /must install D3D SDK///-> linker-> Input-> additional dependency option-> d3d9.lib//VC tools-> Option-> VC + + directory dropdown box Select library file with include file add DX in Clude and Lib directory//=============================================================================   #include < d3d9.h>    //-----------------------------------------------------------------------------/global variable//- ----------------------------------------------------------------------------lpdirect3d9              g_pd3d       = NULL; Direct3D object lpdirect3ddevice9       g_pd3ddevice = NULL; Direct3D Device Objects    //-----------------------------------------------------------------------------// Desc: Initialize Direct3D//-----------------------------------------------------------------------------HRESULT Initd3d ( HwnD hWnd) {    //Create Direct3D object that is used to create Direct3D device Objects     if (NULL = G_pd3d = Direct3 DCreate9 (d3d_sdk_version))         return e_fail;       //Set up d3dpresent_parameters structure, ready to create Direct3D device object     D3dpresent_ PARAMETERS D3DPP;     ZeroMemory (&AMP;D3DPP, sizeof (D3DPP));     D3DPP. windowed = TRUE;     D3DPP. SwapEffect = D3dswapeffect_discard;     D3DPP. Backbufferformat = D3dfmt_unknown;       //Create Direct3D Device Objects     if FAILED (G_pd3d->createdevice (d3dadapter_ DEFAULT, D3ddevtype_hal, HWnd,                                         d3dcreate_software_vertexprocessing,                                        &AMP;D3DPP, &g_ Pd3ddevice))     {        return e_fail;    } &nbs P    return S_OK; }    //-----------------------------------------------------------------------------//DESC: Releasing created objects//--- --------------------------------------------------------------------------VOID Cleanup () {     //Release Direct3D device Object     if (g_pd3ddevice!= NULL)         g_ Pd3ddevice->release ();       //Release Direct3D Object     if (g_pd3d!= NULL)      & nbsp;  g_pd3d->release (); }    //-----------------------------------------------------------------------------//DESC: Rendering graphics//----- ------------------------------------------------------------------------VOID Render () {   // Empty back buffers     g_pd3ddevice->clear (0, NULL, D3dclear_target, D3dcolor_xrgb (), 170), 1.0f, 0);        //Start drawing graphics in background buffers     if (SUCCEEDED (G_pd3ddevice->beginscene) )     {       //here in the background buffer draw graphics             //end of rendering graphics         g_pd3ddevice-> in the background buffer EndScene ();    }      //The graphics drawn in the background buffer will be submitted to the foreground buffer display     g_pd3ddevice->present ( NULL, NULL, NULL, NULL); }    //-----------------------------------------------------------------------------//DESC: Message processing//----- ------------------------------------------------------------------------lresult WINAPI Msgproc (HWND hwnd, UINT MSG, WPARAM WPARAM, LPARAM LPARAM) {    switch (msg)     {        case Wm_destroy:   & nbsp;         Cleanup ();             postquitmessage (0);             return 0;           case WM_PAINT:              Render ();             ValidateRect (hWnd, NULL);             return 0;    }       return DefWindowProc (hWnd, MSG, WParam, LParam); }    //-----------------------------------------------------------------------------//DESC: Program Entry//----- ------------------------------------------------------------------------INT winapi WinMain (hinstance hinst, HINSTANCE, LPSTR, INT) {   //Register window class     Wndclassex WC = {sizeof (wndclassex), CS_CLASSDC, Msgproc, 0L, 0L,                        GetModuleHandle (NULL), NULL, NULL, NULL, NULL,                        L "ClassName", NULL};     RegisterClassEx (&AMP;WC);      //Create window     hwnd hwnd = CreateWindow (L "ClassName", L "simplest Direct3D program", &NBSP;&N bsp;                             Ws_overlappedwindow, MB,                                 NULL, NULL, wc.hinstance, NULL);      //initialization of Direct3D     if (SUCCEEDED (Initd3d (hWnd))     {        //Show main window          ShowWindow (hWnd, Sw_ Showdefault);          UpdateWindow (HWND);           /Enter message loop          MSG msg;          ZeroMemory (&msg, sizeof (msg));          while (msg.message!=wm_quit)           {              if ( PeekMessage (&msg, NULL, 0U, 0U, pm_remove))            & nbsp;  {                   TranslateMessage (&msg);                    DispatchMessage (&AMP;MSG);              }                Else                {                    Render ();  //Render Graphics               }         }    }        Unregisterclass (L "ClassName", wc.hinstance);     return 0; }