dim key1 as microsoft.win32.registrykey
        key1 = my.computer.registry.currentuser   '返回當前用戶鍵
        dim key2 as microsoft.win32.registrykey
     
        key2 = key1.opensubkey("northsnow")       '返回當前用戶鍵下的northsnow鍵
        if not key2 is nothing then
            key1.deletesubkey("northsnow")  '如果鍵不存在就創建它
        end if
 3,創建或讀取注冊表項

dim key1 as microsoft.win32.registrykey
        key1 = my.computer.registry.currentuser   '返回當前用戶鍵
        dim key2 as microsoft.win32.registrykey
        key2 = key1.opensubkey("northsnow", true)       '返回當前用戶鍵下的northsnow鍵,如果想創建項，必須指定第二個參數為true
        if key2 is nothing then
            key2 = key1.createsubkey("northsnow")  '如果鍵不存在就創建它
        end if

        '創建項，如果不存在就創建，如果存在則覆蓋
        key2.setvalue("name", "塞北的雪")
        key2.setvalue("sex", true)
        key2.setvalue("age", 30)

        '返回項值
        dim sb as new system.text.stringbuilder
        sb.appendline(key2.getvalue("name"))
        sb.appendline(key2.getvalue("sex"))
        sb.appendline(key2.getvalue("age"))
        msgbox(sb.tostring)

        '查驗某個項是否存在
        if (key2.getvalue("name")) is nothing then
            msgbox("no")
        else
            msgbox("yes")
        end if

        if (key2.getvalue("name2")) is nothing then
            msgbox("no")
        else
            msgbox("yes")
        end if

'輸出
'  塞北的雪
'true
'30
'yes
'no
4,遍歷注冊表

這個也非常簡單，在窗體上放一個按鈕和兩個文本框，添加如下的代碼

  dim sb as new system.text.stringbuilder  '返回遍歷結果
    dim sb2 as new system.text.stringbuilder  '返回讀取出錯的注冊表鍵
    private sub button3_click()sub button3_click(byval sender as system.object, byval e as system.eventargs) handles button3.click
        dim key1 as microsoft.win32.registrykey
        key1 = my.computer.registry.currentuser   '返回當前用戶鍵
        if not key1 is nothing then
            sb.appendline(key1.name)
            readvalue(key1)
            readreg(key1)
        end if
        me.textbox1.text = sb.tostring
        me.textbox2.text = sb2.tostring
    end sub
    '遍歷注冊表鍵樹
    private sub readreg()sub readreg(byval r as microsoft.win32.registrykey)
        if r.subkeycount > 0 then
            dim keyname() as string
            dim keytemp as microsoft.win32.registrykey
            keyname = r.getsubkeynames
            dim i as integer
            for i = 0 to keyname.getlength(0) - 1
                try
                    sb.appendline(keyname(i))
                    keytemp = r.opensubkey(keyname(i), true)
                    readvalue(keytemp)
                    readreg(keytemp)
                catch ex as exception
                    sb2.appendline(keyname(i))
                end try
            next
        end if
    end sub
    '遍歷某鍵下的項
    private sub readvalue()sub readvalue(byval r as microsoft.win32.registrykey)
        if r.valuecount > 0 then
            dim valuename() as string
            dim i as integer
            valuename = r.getvaluenames
            for i = 0 to valuename.getlength(0) - 1
                sb.appendline("####")
                sb.append(r.name)
                sb.append("----")
                sb.append(r.getvalue(valuename(i)).tostring)
            next
        end if
    end sub