1.ҪһAAڵǰвܵãҪһBBɵǰģей̶ԵãҪһCCģ鶼ԵãӦ
   Dim AA As String   ùڲ
   Private BB As String   ģ鶥
   Public CC As String   ģ鶥
2.ͷݱͶǵʲôԼͷž̬Ͷ̬ʲô
  ñֵʧ˹ͷűԶͷַʽͨıָԶͷֵʱ䷶Χ.
 ߶ENDͷֵڶʹSet丳ֵNothing

  ̬ڹ̽ʱԶͷűֵ
  ֹ̬ͷţɾģʱԶͷűֵ߹رչʱͷűֵ
3.Աͳֵʲô
   ֱӸֵ
4.ΪʲôҪ幫
   򻯹ظ