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      • vb教程之在VB編程中使用系統“注冊表” (加入

      • 2017-09-21 16:19 來源:未知
       文/朱文剛

        用VB編程,在打開一個主鍵時,常常會用RegOpenKey,比如要鎖定注冊表就寫成:

        Private Declare Function RegOpenKey Lib "advapi32.dll" Alias "RegOpen

        KeyA" (ByVal hKey As Long, ByVal lpSubKey As String, phkRes 
      ult As Long) As Long

        ...... 

        Dim Hkey,r As Long

        r=RegOpenKey(HKCU,LockREG,Hkey)

        ........

        但是,有沒有想過有的用戶注冊表中沒有System主鍵,就無法打開這個子鍵,也就無法實現這個功能。解決的辦法是用另一個API,RegCreateKey這個API有主鍵則打開,如果沒有就自動創建并打開。所以上面的代碼應寫成

        Private Declare Function RegCreateKey Lib "advapi32.dll" Alias "RegCreateKeyA" (ByVal hKey As Long, ByVal lpSubKey As String, phkResult As Long) As Long

        ......

        r=RegCreateKey(HKCU,LockREG,Hkey)

        ......

        這樣就不會出錯了。放棄RegOpenKey吧,把用RegOpenKey的地方全部改成RegCreateKey,因為參數相同,所以不會出錯。這樣你的軟件才能在所有用戶的機器上通行無阻。(文中的HKCU = HKEY_CURRENT_USER;LockREG = Software\Microsoft\Windows\CurrentVerson\Policies\System)
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