COMMAND4（撤消）的CLICK事件代码是
??chr(7)                  
result=messagebox("是否确认放弃添加？",4+48+256,"信息窗口")
if result=6                           
thisform.t1.enabled=.f.
   thisform.t2.enabled=.f.
   thisform.t3.enabled=.f.
   thisform.t4.enabled=.f.
   thisform.t5.enabled=.f.
   this.enabled=.f.
   
   
   
   thisform.refresh
endif