if (not isnull(ls_right_pwd) and not isnull(ls_input_pwd)) and ls_right_pwd
<> ls_input_pwd then
   messagebox ('提示' ,'口令不正确!')
   sle_pwd.setfocus ()
   return
end if
incompatible tyers in boolean expreesion：boolean ，string
coodition for if statement must be a boolean

数据库字段类型问题