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[lyllm_117228]

//=============================================================================
// Desc: 最简单的Direct3D程序,
//=============================================================================

#include <d3d9.h>


//-----------------------------------------------------------------------------
// 全局变量
//-----------------------------------------------------------------------------
LPDIRECT3D9 g_pD3D = NULL; //Direct3D对象
LPDIRECT3DDEVICE9 g_pd3dDevice = NULL; //Direct3D设备对象


//-----------------------------------------------------------------------------
// Desc: 初始化Direct3D
//-----------------------------------------------------------------------------
HRESULT InitD3D( HWND hWnd )
{
//创建Direct3D对象, 该对象用来创建Direct3D设备对象
if( NULL == ( g_pD3D = Direct3DCreate9( D3D_SDK_VERSION ) ) )
return E_FAIL;

//设置D3DPRESENT_PARAMETERS结构, 准备创建Direct3D设备对象
D3DPRESENT_PARAMETERS d3dpp;
ZeroMemory( &d3dpp, sizeof(d3dpp) );
d3dpp.Windowed = TRUE;
d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD;
d3dpp.BackBufferFormat = D3DFMT_UNKNOWN;

//创建Direct3D设备对象
if( FAILED( g_pD3D->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, hWnd,
D3DCREATE_SOFTWARE_VERTEXPROCESSING,
&d3dpp, &g_pd3dDevice ) ) )
{
return E_FAIL;
}

return S_OK;
}


//-----------------------------------------------------------------------------
// Desc: 释放创建对象
//-----------------------------------------------------------------------------
VOID Cleanup()
{
//释放Direct3D设备对象
if( g_pd3dDevice != NULL)
g_pd3dDevice->Release();

//释放Direct3D对象
if( g_pD3D != NULL)
g_pD3D->Release();
}


//-----------------------------------------------------------------------------
// Desc: 渲染图形
//-----------------------------------------------------------------------------
VOID Render()
{
//清空后台缓冲区
g_pd3dDevice->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(45, 50, 170), 1.0f, 0 );

//开始在后台缓冲区绘制图形
if( SUCCEEDED( g_pd3dDevice->BeginScene() ) )
{
//在此在后台缓冲区绘制图形

//结束在后台缓冲区渲染图形
g_pd3dDevice->EndScene();
}

//将在后台缓冲区绘制的图形提交到前台缓冲区显示
g_pd3dDevice->Present( NULL, NULL, NULL, NULL );
}


//-----------------------------------------------------------------------------
// Desc: 消息处理
//-----------------------------------------------------------------------------
LRESULT WINAPI MsgProc( HWND hWnd, UINT msg, WPARAM wParam, LPARAM lParam )
{
switch( msg )
{
case WM_DESTROY:
Cleanup();
PostQuitMessage( 0 );
return 0;

case WM_PAINT:
Render();
ValidateRect( hWnd, NULL );
return 0;
}

return DefWindowProc( hWnd, msg, wParam, lParam );
}


//-----------------------------------------------------------------------------
// Desc: 程序入口
//-----------------------------------------------------------------------------
INT WINAPI WinMain( HINSTANCE hInst, HINSTANCE, LPSTR, INT )
{
//注册窗口类
WNDCLASSEX wc = { sizeof(WNDCLASSEX), CS_CLASSDC, MsgProc, 0L, 0L,
GetModuleHandle(NULL), NULL, NULL, NULL, NULL,
"ClassName", NULL };
RegisterClassEx( &wc );

//创建窗口
HWND hWnd = CreateWindow( "ClassName", "最简单的Direct3D程序",
WS_OVERLAPPEDWINDOW, 200, 100, 600, 500,
NULL, NULL, wc.hInstance, NULL );

//初始化Direct3D
if( SUCCEEDED( InitD3D( hWnd ) ) )
{
//显示主窗口
ShowWindow( hWnd, SW_SHOWDEFAULT );
UpdateWindow( hWnd );

//进入消息循环
MSG msg;
ZeroMemory( &msg, sizeof(msg) );
while( msg.message!=WM_QUIT )
{
if( PeekMessage( &msg, NULL, 0U, 0U, PM_REMOVE ) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
else
{
Render(); //渲染图形
}
}
}

UnregisterClass( "ClassName", wc.hInstance );
return 0;
}

为什么我在Tools->options下把Lib 选X86时 程序没有错误但Direct3DCreate9( D3D_SDK_VERSION )返回空。
选 X64时程序就出现C:\PROGRAM FILES\MICROSOFT DIRECTX SDK (NOVEMBER 2008)\LIB\X64\d3d9.lib : fatal error LNK1113: invalid machine type错误
那位大哥帮帮我啦！
谢谢

[levelmouse]

Rebuild

[fandh]

应该是环境不对，具体不知道，帮顶！

[oyljerry]

X86 表示编译32位程序， x64表示编译64位程序

[oyljerry]

Direct3DCreate9( D3D_SDK_VERSION )返回空
--GetLastError等查看一下错误

[jameshooo]

没有初始化COM环境，在WinMain的开始处调用CoInitialize(NULL)，退出前调用CoUninitialize()