定时关闭的消息提示框

有时需要弹出一个messagebox提醒用户, messagebox会导致线程阻塞, 如果用户一直不点确定，则线程会一直阻塞在那里。

这个类实现了一个messagebox，如果用户在指定时间内没有点确定，则自动关闭该消息框。

 

class AutoCloseMsg
{
public:
AutoCloseMsg(void);
~AutoCloseMsg(void);
void ShowMsg(LPCTSTR szContext,LPCTSTR szTitle,unsigned long uTime = 30000);
static DWORD __stdcall ShowMsgThread(void* pParam);

private:
LPCTSTR szContext;
LPCTSTR szTitle;
unsigned long uTime;
HANDLE hWait;
};

AutoCloseMsg::AutoCloseMsg(void)
{
hWait = CreateEventA(NULL,false,false,NULL);
}

AutoCloseMsg::~AutoCloseMsg(void)
{
}

void AutoCloseMsg::ShowMsg(LPCTSTR szContext,LPCTSTR szTitle,unsigned long uTime)
{
this->szContext = szContext;
this->szTitle = szTitle;
this->uTime = uTime;
unsigned long ulThreadId;
HANDLE m_hThread = CreateThread(NULL, 0, ShowMsgThread, this, 0, &ulThreadId);
if(NULL == m_hThread)
{
return ;
}
else
{
CloseHandle(m_hThread);
}

if (WAIT_TIMEOUT == WaitForSingleObject(hWait,uTime))
{
HWND hwnd = ::FindWindow(NULL,	szTitle);
if(hwnd)
{
::SendMessage(hwnd,WM_CLOSE,NULL,NULL);
}

}

return;

}

DWORD AutoCloseMsg::ShowMsgThread(void* pParam)
{
AutoCloseMsg* acm = (AutoCloseMsg*)pParam;
MessageBox(NULL,acm->szContext,acm->szTitle,MB_OK);
SetEvent(acm->hWait);

return 0;
}

int _tmain(int argc, _TCHAR* argv[])
{

AutoCloseMsg automsg;
automsg.ShowMsg(_T("5秒后消失"),_T("xxx消息提示"),5000);
getchar();
return 0;
}