小问题，立刻结贴

[bjzhaoxiao]

//BEEPER2.C
/*---------------------------------------------------------------------------
BEEPER2.C -- Timer Demo Program No. 2
(c) Charles Petzold, 1998
---------------------------------------------------------------------------*/

#include <windows.h>
#define ID_TIMER 1

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
VOID CALLBACK TimerProc (HWND, UINT, UINT, DWORD ) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,PSTR szCmdLine, int iCmdShow)
{

static char szAppName[] = "Beeper2" ;
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;

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 = szAppName ;

if (!RegisterClass (&wndclass))
{
MessageBox ( NULL, TEXT ("Program requires Windows NT!"),
szAppName, MB_ICONERROR) ;
return 0 ;
}

hwnd = CreateWindow ( szAppName, "Beeper2 Timer Demo",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, CW_USEDEFAULT,
CW_USEDEFAULT, CW_USEDEFAULT,
NULL, NULL, hInstance, NULL) ;

ShowWindow (hwnd, iCmdShow) ;
UpdateWindow (hwnd) ;



while (GetMessage (&msg, NULL, 0, 0))
{
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;

}

LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{

switch (message)
{
case WM_CREATE:
SetTimer (hwnd, ID_TIMER, 1000, TimerProc) ;
return 0 ;

case WM_DESTROY:
KillTimer (hwnd, ID_TIMER) ;
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;

}

VOID CALLBACK TimerProc (HWND hwnd, UINT message, UINT iTimerID, DWORD dwTime)
{

static BOOL fFlipFlop = FALSE ;
HBRUSH hBrush ;
HDC hdc ;
RECT rc ;

MessageBeep (-1) ;
fFlipFlop = !fFlipFlop ;

GetClientRect (hwnd, &rc) ;
hdc = GetDC (hwnd) ;
hBrush = CreateSolidBrush (fFlipFlop ? RGB(255,0,0) : RGB(0,0,255)) ;

FillRect (hdc, &rc, hBrush) ;
ReleaseDC (hwnd, hdc) ;
DeleteObject (hBrush) ;

}
编译后出现下列问题：
　　--------------------Configuration: BeepTest2 - Win32 Debug--------------------
Compiling...
BeepTest.cpp
Linking...
LIBCD.lib(crt0.obj) : error LNK2001: unresolved external symbol _main
Debug/BeepTest2.exe : fatal error LNK1120: 1 unresolved externals
Error executing link.exe.

BeepTest2.exe - 2 error(s), 0 warning(s)

[bjzhaoxiao]

我的环境是VC++6.0 english
win2000 advanced server

[jemmylau]

在我这编译没有任何问题。

窗口会定时更换颜色。

我的环境：vc++6.0 english
win2k pro

可能是你的编译器设置有问题，检查一下。

我建一个空的win32工程BEEPER2，又建了一个文件BEEPER2.c，编译后就执行了，没有任何错误和警告

[guanxg]

我刚才测试了你的代码，通过向导生成一个空的WIN32工程，向工程添加一个空的.cpp文件，向其中添加你的所有代码，程序成功执行。

[In355Hz]

工程类型错误，重新建一个 Win32 Application 或者修改工程 Project Settings --> Link Page --> Project Options --> 找到 /subsystem:console 改为 /subsystem:windows

[b971049]

同意楼上

[bjzhaoxiao]

谢谢各位，现在结贴