我编写了一个windows程序，编译成功后运行出现下面的错误提示：


--------------------Configuration: WinMain - Win32 Debug--------------------
Linking...
LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Debug/WinMain.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

各位帮忙解决一下

怎么操作

代码没问题,我一开始新建好第一次运行它时就可以成功！
而后关掉后再打开就开始提示上面的错误了
Release环境也试过了没用还是一样的错误~~

不是的我的编译是成功的
只是在运行的时候出现这样的问题而已

是这样的当我选择Compile（ctrl+F7 )时，提示没有错误！

当我选择build(F7)时，就提示错误了

在我开始时用新建然后将代码输入后编译运行都是成功的

然后我保存关闭后

又打开工作区然后再次编译运行就出错了

#include <windows.h>
#include <stdio.h>
LRESULT CALLBACK WndProc(
HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
);

int WINAPI WinMain(
HINSTANCE hInstance, // handle to current instance
HINSTANCE hPrevInstance, // handle to previous instance
LPSTR lpCmdLine, // pointer to command line
int nCmdShow // show state of window
)
{
WNDCLASS wndcls;
wndcls.cbClsExtra=0;
wndcls.cbWndExtra=0;
wndcls.hbrBackground=(HBRUSH)GetStockObject(GRAY_BRUSH);
wndcls.hCursor=LoadCursor(hInstance,IDC_WAIT);
wndcls.hIcon=LoadIcon(hInstance,IDI_QUESTION);
wndcls.hInstance=hInstance;
wndcls.lpfnWndProc=WndProc;
wndcls.lpszClassName="suyu'winmain";
wndcls.lpszMenuName=NULL;
wndcls.style=CS_HREDRAW|CS_VREDRAW;
RegisterClass(&wndcls);
HWND hwnd;
hwnd=CreateWindow("suyu'winmain","一个简单的winmain程序事例",WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,CW_USEDEFAULT,
NULL,NULL,hInstance,NULL);
ShowWindow(hwnd,SW_SHOWNORMAL);
UpdateWindow(hwnd);
MSG msg;
while(GetMessage(&msg,NULL,0,0))
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return 0;
}

LRESULT CALLBACK WndProc(HWND hwnd, // handle to window
UINT uMsg, // message identifier
WPARAM wParam, // first message parameter
LPARAM lParam // second message parameter
)
{
switch(uMsg)
{
case WM_CHAR:
char szchar[20];
sprintf(szchar,"按下了字母是%d",wParam);
MessageBox(hwnd,szchar,"suyu'winmain",0);
break;
case WM_LBUTTONDOWN:
MessageBox(hwnd,"鼠标左键被按下","suyu'winmain",MB_OK);
HDC hdc;
hdc=GetDC(hwnd);
TextOut(hdc,50,50,"一个简单的winmain程序事例",strlen("一个简单的winmain程序事例"));
ReleaseDC(hwnd,hdc);
break;
case WM_PAINT:
HDC hDC;
PAINTSTRUCT ps;
hDC=BeginPaint(hwnd,&ps);
TextOut(hDC,10,0,"winmain程序",strlen("winmain程序"));
EndPaint(hwnd,&ps);
break;
case WM_CLOSE:
if(IDYES==MessageBox(hwnd,"是否真的结束？","suyu'winmain",MB_YESNO))
{
DestroyWindow(hwnd);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
return 0;
}