自动的关闭对话框 MessageBox

//

#include <stdlib.h>
#include <stdio.h>
#include <windows.h>

/********************************/
// Code By 
/********************************/

HHOOK hook=NULL;
int  MSGRET=0;
int  k=0;
HWND MSGHWND,TEXTHWND;
UINT TD;

void CALLBACK TimerProc(
      HWND hwnd, 
      UINT uMsg, 
      UINT idEvent, 
      DWORD dwTime )
{
 if (k==0)
 {
  k=5;
  SendMessageA(MSGHWND,WM_COMMAND,6,0);
 }else
 {
  k--;
  char title[100]={0};
  sprintf(title,"退出时间还剩: %d 秒",k);
  SetWindowText(TEXTHWND,title);
 }
}

LRESULT CALLBACK CBTProc(
       int nCode,      // hook code
       WPARAM wParam,  // depends on hook code
       LPARAM lParam   // depends on hook code
       )
{
 if (nCode==WH_CBT)
 {
  UnhookWindowsHookEx(hook);
        k=5;
        MSGHWND=(HWND)wParam;
        TEXTHWND=GetDlgItem(MSGHWND,65535);
  TD=SetTimer(0,1,1000,(TIMERPROC)TimerProc);
 }
 return 0;
}
void main()
{
 
 hook = SetWindowsHookEx(WH_CBT,(HOOKPROC)CBTProc,GetModuleHandle(NULL),0);
 MSGRET=MessageBox(NULL,"退出时间还剩: 5 秒","提示信息:",0x40);
 
 //MSGRET 用来确定你单击的是哪个按钮
 MSG msg;
 while (GetMessage(&msg,NULL,NULL,NULL))
 {
  TranslateMessage(&msg);
  DispatchMessage(&msg);
 }

}