我第一次用DIRECTX编程，用vc6.0编译，没有错误，但运行时看不到结果，why？？？？

Question

同标题

Answer 1

directx下面有很多部分，directshow、directsound、directgraphics等等，每一个都不一样，你这样说别人都不能理解是什么意思。

Answer 2

编译MSDN第一张后面的SDK\GRAPHY\DX
例子

Answer 3

源码
#include <d3d8.h>LPDIRECT3D8 g_pD3D = NULL;
LPDIRECT3DDEVICE8 g_pD3DDevice = NULL;
LPDIRECT3DVERTEXBUFFER8 g_pVertexBuffer = NULL; // Buffer to hold vertices
struct CUSTOMVERTEX
{
    FLOAT x, y, z, rhw; // The transformed position for the vertex.
    DWORD colour; // The vertex colour.
};#define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZRHW|D3DFVF_DIFFUSE)#define SafeRelease(pObject) if(pObject != NULL) {pObject->Release(); pObject=NULL;}HRESULT InitialiseD3D(HWND hWnd)
{
    //First of all, create the main D3D object. If it is created successfully we 
    //should get a pointer to an IDirect3D8 interface.
    g_pD3D = Direct3DCreate8(D3D_SDK_VERSION);
    if(g_pD3D == NULL)
    {
        return E_FAIL;
    }    //Get the current display mode
    D3DDISPLAYMODE d3ddm;
    if(FAILED(g_pD3D->GetAdapterDisplayMode(D3DADAPTER_DEFAULT, &d3ddm)))
    {
        return E_FAIL;
    }    //Create a structure to hold the settings for our device
    D3DPRESENT_PARAMETERS d3dpp; 
    ZeroMemory(&d3dpp, sizeof(d3dpp));    //Fill the structure. 
    //We want our program to be windowed, and set the back buffer to a format
    //that matches our current display mode
    d3dpp.Windowed = TRUE;
    d3dpp.SwapEffect = D3DSWAPEFFECT_COPY_VSYNC;
    d3dpp.BackBufferFormat = d3ddm.Format;    //Create a Direct3D device.
    if(FAILED(g_pD3D->CreateDevice(D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd, 
                                   D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &g_pD3DDevice)))
    {
        return E_FAIL;
    }
    
    return S_OK;
}HRESULT InitialiseVertexBuffer()
{
VOID* pVertices;

//Store each point of the triangle together with it's colour
CUSTOMVERTEX cvVertices[] =
{
{250.0f, 100.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(255, 0, 0),}, //Vertex 1 - Red (250, 100)
{400.0f, 350.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(0, 255, 0),}, //Vertex 2 - Green (400, 350)
{100.0f, 350.0f, 0.5f, 1.0f, D3DCOLOR_XRGB(0, 0, 255),}, //Vertex 3 - Blue (100, 350)
}; //Create the vertex buffer from our device
if(FAILED(g_pD3DDevice->CreateVertexBuffer(3 * sizeof(CUSTOMVERTEX),
                                               0, D3DFVF_CUSTOMVERTEX,
                                               D3DPOOL_DEFAULT, &g_pVertexBuffer)))
{
return E_FAIL;
} //Get a pointer to the vertex buffer vertices and lock the vertex buffer
if(FAILED(g_pVertexBuffer->Lock(0, sizeof(cvVertices), (BYTE**)&pVertices, 0)))
{
return E_FAIL;
} //Copy our stored vertices values into the vertex buffer
memcpy(pVertices, cvVertices, sizeof(cvVertices)); //Unlock the vertex buffer
g_pVertexBuffer->Unlock();    return S_OK;
}void Render()
{
    if(g_pD3DDevice == NULL)
    {
        return;
    }    //Clear the backbuffer to black
    g_pD3DDevice->Clear(0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0, 0, 0), 1.0f, 0);
    
    //Begin the scene
    g_pD3DDevice->BeginScene();
        //Rendering our triangle
g_pD3DDevice->SetStreamSource(0, g_pVertexBuffer, sizeof(CUSTOMVERTEX));
g_pD3DDevice->SetVertexShader(D3DFVF_CUSTOMVERTEX);
g_pD3DDevice->DrawPrimitive(D3DPT_TRIANGLELIST, 0, 1);
    //End the scene
    g_pD3DDevice->EndScene();
    
    //Filp the back and front buffers so that whatever has been rendered on the back buffer
    //will now be visible on screen (front buffer).
    g_pD3DDevice->Present(NULL, NULL, NULL, NULL);
}void CleanUp()
{
SafeRelease(g_pVertexBuffer);
SafeRelease(g_pD3DDevice);
SafeRelease(g_pD3D);
}void GameLoop()
{
    //Enter the game loop
    MSG msg; 
    BOOL fMessage;    PeekMessage(&msg, NULL, 0U, 0U, PM_NOREMOVE);
    
    while(msg.message != WM_QUIT)
    {
        fMessage = PeekMessage(&msg, NULL, 0U, 0U, PM_REMOVE);        if(fMessage)
        {
            //Process message
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
        else
        {
            //No message to process, so render the current scene
            Render();
        }    }
}//The windows message handler
LRESULT WINAPI WinProc(HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
    switch(msg)
    {
        case WM_DESTROY:
            PostQuitMessage(0);
            return 0;
        break;
        case WM_KEYUP: 
            switch (wParam)
            { 
                case VK_ESCAPE:
                    //User has pressed the escape key, so quit
                    DestroyWindow(hWnd);
                    return 0;
                break;
            } 
        break;    }    return DefWindowProc(hWnd, msg, wParam, lParam);
}//Application entry point
INT WINAPI WinMain(HINSTANCE hInst, HINSTANCE, LPSTR, INT)
{
    //Register the window class
    WNDCLASSEX wc = {sizeof(WNDCLASSEX), CS_CLASSDC, WinProc, 0L, 0L, 
                     GetModuleHandle(NULL), NULL, NULL, NULL, NULL,
                     "DX Project 2", NULL};
    RegisterClassEx(&wc);    //Create the application's window
    HWND hWnd = CreateWindow("DX Project 2", "www.andypike.com: Tutorial 2", 
                              WS_OVERLAPPEDWINDOW, 50, 50, 500, 500,
                              GetDesktopWindow(), NULL, wc.hInstance, NULL);    //Initialize Direct3D
    if(SUCCEEDED(InitialiseD3D(hWnd)))
    { 
        //Show our window
        ShowWindow(hWnd, SW_SHOWDEFAULT);
        UpdateWindow(hWnd); //Initialize Vertex Buffer
if(SUCCEEDED(InitialiseVertexBuffer()))
{
//Start game running: Enter the game loop
GameLoop();
}
    }
    
    CleanUp();    UnregisterClass("DX Project 2", wc.hInstance);
    
    return 0;
}