int MessageBox(
 HWND hWnd,     // handle to owner window
 LPCTSTR lpText,   // text in message box
 LPCTSTR lpCaption, // message box title
 UINT uType     // message box style
);

int MessageBoxIndirect(
 CONST LPMSGBOXPARAMS lpMsgBoxParams // message box parameters
);

typedef struct { 
 UINT   cbSize; 
 HWND   hwndOwner; 
 HINSTANCE hInstance; 
 LPCTSTR  lpszText; 
 LPCTSTR  lpszCaption; 
 DWORD   dwStyle; 
 LPCTSTR  lpszIcon; 
 DWORD_PTR dwContextHelpId; 
 MSGBOXCALLBACK lpfnMsgBoxCallback; 
 DWORD   dwLanguageId; 
} MSGBOXPARAMS, *PMSGBOXPARAMS;

HHOOK hMsgBoxHook = SetWindowsHookEx(
 WH_CBT,        // Type of hook 
 CBTProc,        // Hook procedure (see below)
 NULL,         // Module handle. Must be NULL (see docs)
 GetCurrentThreadId()  // Only install for THIS thread!!!
);

LRESULT CALLBACK CBTProc(int nCode, WPARAM wParam, LPARAM lParam)
{
  HWND hwnd;
  if(nCode < 0)
    return CallNextHookEx(hMsgBoxHook, nCode, wParam, lParam);
  switch(nCode)
  {
  case HCBT_ACTIVATE:
    // 现在wParam中就是message box的句柄
    hwnd = (HWND)wParam;
    // 我们已经有了message box的句柄，在这里我们就可以定制message box了!
    return 0;
  }
  // Call the next hook, if there is one
  return CallNextHookEx(hMsgBoxHook, nCode, wParam, lParam);
}

int MsgBoxEx(HWND hwnd, TCHAR *szText, TCHAR *szCaption, UINT uType)
{  
  int ret;
  // Install a thread hook, so we can customize it
  hMsgBoxHook = SetWindowsHookEx(
    WH_CBT, 
    CBTProc, 
    NULL, 
    GetCurrentThreadId()
    );
  // Display a standard message box
  ret = MessageBox(hwnd, szText, szCaption, uType);
  // remove the window hook
  UnhookWindowsHookEx(hMsgBoxHook);
  return ret;
}