D3D 9 绘制一个简单图形

#include  
#include 
#include
#pragma comment( lib, "d3d9.lib") 

#define null NULL
#define RETURN return
 
LPDIRECT3D9             g_pD3D = NULL;  
LPDIRECT3DDEVICE9       g_pd3dDevice = NULL;  
LPDIRECT3DVERTEXBUFFER9 g_pVB = NULL;  
 
    struct CUSTOMVERTEX 
    {
         
        float x, y, z, rhw;  
        DWORD color;  
    };  
#define FVF ( D3DFVF_XYZRHW | D3DFVF_DIFFUSE ) 
     
    HRESULT InitD3D(HWND hWnd) 
        { 
        g_pD3D = Direct3DCreate9(D3D_SDK_VERSION);  
        D3DPRESENT_PARAMETERS   d3dpp;  
        ZeroMemory(&d3dpp, sizeof(d3dpp));  
        d3dpp.Windowed = TRUE;  
        d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;  
        d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;  
        g_pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, D3DCREATE_HARDWARE_VERTEXPROCESSING,&d3dpp, &g_pd3dDevice);  
        return S_OK;  
        } 
         
        HRESULT InitVB() 
        { 
        CUSTOMVERTEX v[] =  
        { 
        100, 000, 0, 1, 0xffff0000,  
        300, 50, 0, 1, 0xff00ff00,  
        500, 400, 0, 1, 0xff0000ff 
        };  
         
        g_pd3dDevice->CreateVertexBuffer(3 * sizeof(v), 0, FVF, D3DPOOL_DEFAULT, &g_pVB, 0);  
         
        void* vb;  
        g_pVB->Lock(0, 0, (void**)&vb, 0);  
        memcpy(vb, v, sizeof(v));  
        g_pVB->Unlock();  
        return S_OK;  
        } 
        void Render() 
        { 
        g_pd3dDevice->Clear(0, 0, D3DCLEAR_TARGET, D3DCOLOR_XRGB(255, 255, 0), 1, 0);  
         
        g_pd3dDevice->BeginScene();  
        g_pd3dDevice->SetStreamSource(0, g_pVB, 0, sizeof(CUSTOMVERTEX));  
        g_pd3dDevice->SetFVF(FVF);  
        //g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLELIST, 0, 10);
        g_pd3dDevice->DrawIndexedPrimitive(D3DPT_TRIANGLELIST, 0, 0, 4, 0, 4);
        g_pd3dDevice->EndScene();  
         
        g_pd3dDevice->Present(0, 0, 0, 0);  
        } 
         
        LRESULT CALLBACK WndProc(HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam) 
        { 
        message == WM_CLOSE ? PostQuitMessage(0) : 0;  
        return DefWindowProc(hWnd, message, wParam, lParam);  
        } 
        int WINAPI _tWinMain(HINSTANCE hInstance, HINSTANCE, PTSTR, int) 
        { 
        wchar_t cn[] = L"ClassName";  
        WNDCLASS wc;  
        wc.style = CS_HREDRAW | CS_VREDRAW;  
        wc.lpfnWndProc = WndProc;  
        wc.cbClsExtra = 0;  
        wc.cbWndExtra = 0;  
        wc.hInstance = hInstance;  
        wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);  
        wc.hCursor = LoadCursor(NULL, IDC_ARROW);  
        wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);  
        wc.lpszMenuName = NULL;  
        wc.lpszClassName = cn;
        RegisterClass(&wc);  
         
        HWND hWnd = CreateWindow(cn, 0, WS_OVERLAPPEDWINDOW, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,NULL, NULL, hInstance, NULL);  
        ShowWindow(hWnd, SW_SHOW);  
         
        InitD3D(hWnd);  
        InitVB();  
        MSG msg;  
        ZeroMemory(&msg, sizeof(msg));  
            while (msg.message != WM_QUIT) 
            { 
                if (PeekMessage(&msg, NULL, 0, 0, PM_REMOVE)) 
                { 
                TranslateMessage(&msg);  
                DispatchMessage(&msg);  
                } 
                else 
                { 
                Render();  
                } 
            } 
            return 0;  
        }