AfxMessageBox("hello",MB_OK,0);
的返回值是什么？

就是要写
if(AfxMessageBox("hello",MB_OK,0)==?)
OnOK();
中的问号怎么写？
msdn中值

Return Value

Zero if there is not enough memory to display the message box; otherwise one of the following values is returned:

• IDABORT The Abort button was selected.
  
  
• IDCANCEL The Cancel button was selected.
  
  
• IDIGNORE The Ignore button was selected.
  
  
• IDNO The No button was selected.
  
  
• IDOK The OK button was selected.
  
  
• IDRETRY The Retry button was selected.
  
  
• IDYES The Yes button was selected.
  
  
  请高手指示该怎么写？
  

thank you very much

IDOK和AfxMessageBox（）的值都是int？