清除变量值的marco

sub clear2
 set Revenue=activedocument.variables("MainRevenueRate")
 set Cost=activedocument.variables("MainCostRate")
 set Charge=activedocument.variables("MainChargeRate")
 Cost.setcontent 0,true
 Revenue.setcontent 0,true
 Charge.setcontent 0,true
end sub