输出文本错误

[Ankyo]

大家好,我刚从DOS转到win32编程,下面的代码通不过编译,我加了这几行代码就编译错误了:

case WM_PAINT:
hDC = BeginPaint(hWnd,&ps);
TextOut(hDC,20,20,"Hello Windows!",20);
EndPaint(hWnd,&ps);


请高手指点一下,谢谢

-----------------------------------------------------------------------------------

#include <windows.h>

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

int WINAPI WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpszCmdLine,int nCmdShow)
{
HWND hWnd; // 窗口句柄
MSG Msg; // 消息
WNDCLASS WndClass; // 建立窗口类实例
char lpszClassName[] = "Windows API"; // 窗口类名
char lpszTitle[] = "窗口基本框架"; // 窗口标题

// --------------- 窗口类定义 ----------------
WndClass.style = 0; // 定义窗口样式为缺省类型
WndClass.lpfnWndProc = WndProc; // 窗口处理函数为 WndProc
WndClass.cbClsExtra = 0; // 窗口类无扩展
WndClass.cbWndExtra = 0; //窗口实例无扩展
WndClass.hInstance = hInstance; // 当前窗口实例句柄
WndClass.hIcon = LoadIcon(NULL,IDI_APPLICATION);
// 窗口最小化图标为缺省图标
WndClass.hCursor = LoadCursor(NULL,IDC_ARROW); // 窗口采用箭头光标
WndClass.hbrBackground = (HBRUSH)(COLOR_WINDOW+1); // 窗口背景为白色
WndClass.lpszMenuName = 0; // 窗口无菜单
WndClass.lpszClassName = lpszClassName; // 窗口名为 "Windows API"
// ---------------- 结束定义 ------------------

// 注册窗口类
if(!RegisterClass(&WndClass)) // 如果注册窗口失败,则发出警告声音
{
MessageBeep(0);
return FALSE;
}

// ----------------- 创建窗口 -----------------
hWnd = CreateWindow(lpszClassName, // 窗口类名
lpszTitle, // 窗口标题
WS_OVERLAPPEDWINDOW, // 窗口风格
CW_USEDEFAULT,
CW_USEDEFAULT, // 窗口左上角坐标为缺省值
CW_USEDEFAULT,
CW_USEDEFAULT, // 窗口的高和宽为缺省值
NULL, // 此窗口无父窗口
NULL, // 此窗口无主菜单
hInstance, // 创建此窗口应用程序的当前句柄
NULL); // 不使用该值
// ----------------- 创建结束 ---------------------

ShowWindow(hWnd,nCmdShow); // 显示窗口
UpdateWindow(hWnd); //绘制用户区

//消息循环
while(GetMessage(&Msg,NULL,0,0))
{
TranslateMessage(&Msg);
DispatchMessage(&Msg);
}

return Msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hWnd,UINT message,WPARAM wParam,LPARAM lParam)
{
HDC hDC;
PAINTSTRUCT ps;

switch(message)
{
case WM_DESTROY:
PostQuitMessage(0); //调用 PostQuitMessage 发出 WM_QUIT 消息
case WM_PAINT:
hDC = BeginPaint(hWnd,&ps);
TextOut(hDC,20,20,"Hello Windows!",20);
EndPaint(hWnd,&ps);
default:
return DefWindowProc(hWnd,message,wParam,lParam);
}
return 0;
};

[thisisll]

switch(message)
{
case WM_DESTROY:
...
break;<<<==================
case WM_PAINT:
...
break; <<=====================
default:
return DefWindowProc(hWnd,message,wParam,lParam);
}

[snowbirdfly]

明显是case语句少break~~~
这个是C语言里面比较基础的问题～～～

[snowbirdfly]

switch(message)
{
case WM_DESTROY:
PostQuitMessage(0); //调用 PostQuitMessage 发出 WM_QUIT 消息
　　　　　　　　　　break;
case WM_PAINT:
hDC = BeginPaint(hWnd,&ps);
TextOut(hDC,20,20,"Hello Windows!",20);
EndPaint(hWnd,&ps);
break;
default:
return DefWindowProc(hWnd,message,wParam,lParam);
}
return 0;
};

[Ankyo]

还行不行,出现以下错误:

Linking...
LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Debug/windows框架.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

[Ankyo]

还行不行,出现以下错误:

Linking...
LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Debug/windows框架.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.