★★★敬请留意★★★:和微软一模一样的记事本的源代码(5)[3]

[入库:2005年8月18日] [更新:2007年3月24日]

本文简介:选择自 deak 的 blog

      rtn = regqueryvalueex(hkey, entry, 0, reg_binary, sbuffer, lbuffersize) 'get the value from the registry
      if rtn = error_success then 'if the value could be retreived then
         rtn = regclosekey(hkey)  'close the key
         getbinaryvalue = sbuffer 'return the value to the user
      else                        'otherwise, if the value couldnt be retreived
         getbinaryvalue = "error" 'return error to the user
         if displayerrormsg = true then 'if the user wants to errors displayed
            msgbox errormsg(rtn)  'display the error to the user
         end if
      end if
   else 'otherwise, if the key couldnt be opened
      getbinaryvalue = "error" 'return error to the user
      if displayerrormsg = true then 'if the user wants to errors displayed
         msgbox errormsg(rtn)  'display the error to the user
      end if
   end if
end if

end function
function deletekey(keyname as string)

call parsekey(keyname, mainkeyhandle)

if mainkeyhandle then
   rtn = regopenkeyex(mainkeyhandle, keyname, 0, key_write, hkey) 'open the key
   if rtn = error_success then 'if the key could be opened then
      rtn = regdeletekey(hkey, keyname) 'delete the key
      rtn = regclosekey(hkey)  'close the key
   end if
end if

end function

function getmainkeyhandle(mainkeyname as string) as long

const hkey_classes_root = &h80000000
const hkey_current_user = &h80000001
const hkey_local_machine = &h80000002
const hkey_users = &h80000003
const hkey_performance_data = &h80000004
const hkey_current_config = &h80000005
const hkey_dyn_data = &h80000006
  
select case mainkeyname
       case "hkey_classes_root"
            getmainkeyhandle = hkey_classes_root
       case "hkey_current_user"
            getmainkeyhandle = hkey_current_user
       case "hkey_local_machine"
            getmainkeyhandle = hkey_local_machine
       case "hkey_users"
            getmainkeyhandle = hkey_users
       case "hkey_performance_data"
            getmainkeyhandle = hkey_performance_data
       case "hkey_current_config"
            getmainkeyhandle = hkey_current_config
       case "hkey_dyn_data"
            getmainkeyhandle = hkey_dyn_data
end select

end function

function errormsg(lerrorcode as long) as string
   
'if an error does accurr, and the user wants error messages displayed, then
'display one of the following error messages

select case lerrorcode
       case 1009, 1015
            geterrormsg = "the registry database is corrupt!"
       case 2, 1010
            geterrormsg = "bad key name"
       case 1011
            geterrormsg = "can't open key"
       case 4, 1012
            geterrormsg = "can't read key"
       case 5
            geterrormsg = "access to this key is denied"
       case 1013
            geterrormsg = "can't write key"
       case 8, 14

本文关键:和微软一模一样的记事本
 

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