纯c语言 MessageBoxTimeout 问题？？

[wzxiaodu]

#include <windows.h>

//extern "C"
//{
int WINAPI MessageBoxTimeoutA(IN HWND hWnd, IN LPCSTR lpText, IN LPCSTR lpCaption, IN UINT uType, IN WORD wLanguageId, IN DWORD dwMilliseconds);
int WINAPI MessageBoxTimeoutW(IN HWND hWnd, IN LPCWSTR lpText, IN LPCWSTR lpCaption, IN UINT uType, IN WORD wLanguageId, IN DWORD dwMilliseconds);
//};
#ifdef UNICODE
#define MessageBoxTimeout MessageBoxTimeoutW
#else
#define MessageBoxTimeout MessageBoxTimeoutA
#endif 


int main()
{
MessageBoxTimeout(0,"ttttt","111111",0,0,2000);
return 0;
}

错误如下：
c:(.text+0x699): undefined reference to `MessageBoxTimeoutA@24'


怎么解决？？？

[wzxiaodu]

是缺什么连接库吗？
我用下面编译也是这种错误？？

gcc 1111.c -luser32 -o 1111.exe

[wzxiaodu]

VB6 里

Private Declare Function MessageBoxTimeout Lib "user32" Alias "MessageBoxTimeoutA" (ByVal hwnd As Long, ByVal lpText As String, ByVal lpCaption As String, ByVal wType As Long, ByVal wlange As Long, ByVal dwTimeout As Long) As Long

这个没问题！！！！！

[日立奔腾浪潮微软松下联想]

#include <windows.h>

#pragma comment(lib, "user32.lib")

[Intel0011]

3楼正解，MessageBoxTimeoutA和MessageBoxTimeoutW是在user32中导出的

#include <windows.h>

int WINAPI MessageBoxTimeoutA(IN HWND hWnd, IN LPCSTR lpText, IN LPCSTR lpCaption, IN UINT uType, IN WORD wLanguageId, IN DWORD dwMilliseconds);
int WINAPI MessageBoxTimeoutW(IN HWND hWnd, IN LPCWSTR lpText, IN LPCWSTR lpCaption, IN UINT uType, IN WORD wLanguageId, IN DWORD dwMilliseconds);

#ifdef UNICODE
#define MessageBoxTimeout MessageBoxTimeoutW
#else
#define MessageBoxTimeout MessageBoxTimeoutA
#endif 
 
#pragma comment(lib, "user32")

int main(void)
{
   MessageBoxTimeout(0,"ttttt","111111",0,0,2000);
   return 0;
}

[wzxiaodu]

加上#pragma也是不行的，gcc不认啊！