VS2008中Unicode的解决办法

 #include <windows.h>

 LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

 int APIENTRY WinMain(HINSTANCE hInstance, HINSTANCE hPreInstance,
                      LPSTR lpCmdLine, int nCmdShow)
 {
     WNDCLASS wndclass;
     HWND hwnd;
     MSG msg;

     //窗口属性
     wndclass.style = CS_HREDRAW | CS_VREDRAW;
     wndclass.lpfnWndProc = WndProc;
     wndclass.cbClsExtra = 0;
     wndclass.cbWndExtra = 0;
     wndclass.hInstance = hInstance;
     wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
     wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
     wndclass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
     wndclass.lpszMenuName = NULL;
     wndclass.lpszClassName = "shang1";

     //注册
     if (!RegisterClass(&wndclass))
         return FALSE;

     //创建窗口
     hwnd = CreateWindow("shang1", "shang1", WS_OVERLAPPEDWINDOW,
         CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT,
         NULL, NULL, hInstance, NULL);

     //显示窗口
     ShowWindow(hwnd, nCmdShow);

     //更新窗口的客户区
     UpdateWindow(hwnd);

     //消息循环
     while (GetMessage(&msg, NULL, 0, 0))//获取消息，遇WM_QUIT退出循环
     {
         TranslateMessage(&msg);//键盘消息转换
         DispatchMessage(&msg);//消息给窗口函数
     }
     return msg.wParam;

 }

 LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
 {
     switch(message)
     {
     case WM_PAINT:
         HDC hdc;
         PAINTSTRUCT ps;
         hdc = BeginPaint(hwnd, &ps);
         TextOut(hdc, 20, 30, "The First Windows Application Showing Window",
             strlen("The First Windows Application Showing Window"));
         EndPaint(hwnd, &ps);
         return 0;
     case WM_DESTROY:
         PostQuitMessage(0);
         return 0;
     }
     return DefWindowProc(hwnd, message, wParam, lParam);
 }

出现如下的问题：

 1>------ 已启动生成: 项目: shang1, 配置: Debug Win32 ------
 1>正在编译...
 1>main.cpp
 1>d:\程序代码\shang1\main.cpp(22) : error C2440: “=”: 无法从“const char [7]”转换为“LPCWSTR”
 1>        与指向的类型无关；转换要求 reinterpret_cast、C 样式转换或函数样式转换
 1>d:\程序代码\shang1\main.cpp(31) : error C2664: “CreateWindowExW”: 不能将参数 2 从“const char [7]”转换为“LPCWSTR”
 1>        与指向的类型无关；转换要求 reinterpret_cast、C 样式转换或函数样式转换
 1>d:\程序代码\shang1\main.cpp(58) : error C2664: “TextOutW”: 不能将参数 4 从“const char [45]”转换为“LPCWSTR”
 1>        与指向的类型无关；转换要求 reinterpret_cast、C 样式转换或函数样式转换
 1>生成日志保存在“file://d:\程序代码\shang1\Debug\BuildLog.htm”
 1>shang1 - 3 个错误，0 个警告
 ========== 生成: 成功 0 个，失败 1 个，最新 0 个，跳过 0 个 ==========

出现问题的原因：UNICODE的问题

在项目属性中，【配置属性】-【常规】-【项目默认值】-【字符集】-

默认为【使用Unicode字符集】，改成【未设置】或【使用多字节字符集】，即可解决问题。

解决办法二是：

wndclass.lpszClassName =L "shang1";

或wndclass.lpszClassName =_T( "shang1");