用VB5讀寫(xiě)注冊(cè)表實(shí)例

用VB5讀寫(xiě)注冊(cè)表實(shí)例
    首先新建一個(gè)工程，在新建的窗體上添加以下控件并設(shè)置相應(yīng)屬性：
    控件名 屬性 值
     Label1 Caption 注冊(cè)表鍵值：
     Label2 Caption 注冊(cè)姓名：
     Label3 Caption 空
     Label4 Caption 注冊(cè)公司：
     Label5 Caption 空
     Label6 Caption 空
     Text1 Text 空
     Text2 Text 空
     Command1 Caption 寫(xiě)入注冊(cè)表
     Command2 Caption 退出
    然后，在程序的聲明部分添加如下代碼：
     Private Declare Function RegCreateKey Lib "advapi32.dll" Alias "RegCreateKeyA" (ByVal hKey As Long, ByVal lpSubKey As String, phkResult As Long) As Long
     Private Declare Function RegQueryValueEx Lib "advapi32.dll" Alias "RegQueryValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, lpData As Any, lpcbData As Long) As Long
     Private Declare Function RegSetValueEx Lib "advapi32.dll" Alias "RegSetValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, lpData As Any, ByVal cbData As Long) As Long
     Const error_success = 0&
     Const error_baddb = 1009&
     Const error_badkey = 1010&
     Const error_cantopen = 1011&
     Const error_cantread = 1012&
     Const error_cantwrite = 1013&
     Const error_registry_recovered = 1014&
     Const error_registry_corrupt = 1015&
     Const error_registry_io_failed = 1016&
     Const hkey_classes_root = &H80000000
     Const hkey_current_user = &H80000001
     Const hkey_local_machine = &H80000002
     Const REG_SZ = 1
     Const regkey = "software\My Soft\My program"
    接著為各個(gè)控件添加代碼，代碼如下：
     Private Sub Command1_Click()
     Dim keyvalue As String
     Dim retvalue As Long
     Dim keyid As Long
     retvalue = RegCreateKey(h da0 key_local_machine, regkey, keyid)
     keyvalue = Text1.Text
     retvalue = RegSetValueEx(keyid, "注冊(cè)名", 0&, REG_SZ, ByVal keyvalue, Len(keyvalue) + 1)
     keyvalue = Text2.Text
     retvalue = RegSetValueEx(keyid, "注冊(cè)公司", 0&, REG_SZ, ByVal keyvalue, Len(keyvalue) + 1)
     If Text1.Text <> "" And Text2.Text <> "" Then
     Label3.Caption = Text1.Text
     Label5.Caption = Text2.Text
     End If
     End Sub
     Private Sub Command2_Click()
     Unload Me
     End
     End Sub
     Private Sub Form_Load()
     Dim retvalue As Long
     Dim result As Long
     Dim keyid As Long
     Dim keyvalue As String
     Dim subkey As String
     Dim bufsize As Long
     Label6.Caption = regkey
     retvalue = RegCreateKey(hkey_local_machine, regkey, keyid)
     If retvalue = 0 Then
     subkey = "注冊(cè)名"
     retvalue = RegQueryValueEx(keyid, subkey, 0&, REG_SZ, 0&, bufsize)
     If bufsize < 2 Then
     keyvalue = ""
     retvalue = RegSetValueEx(keyid, subkey, 0&, REG_SZ, ByVal keyvalue, Len(keyvalue) + 1)
     Else
     keyvalue = String(bufsize + 1, " ")
     retvalue = RegQueryValueEx(keyid, subkey, 0&, REG_SZ, ByVal keyvalue, bufsize)
     keyvalue = Left$(keyvalue, bufsize - 1)
     Text1.Text = keyvalue
     End If
     Label3.Caption = keyvalue
     subkey = "注冊(cè)公司"
     retvalue = RegQueryValueEx(keyid, subkey, 0&, REG_SZ, 0&, bufsize)
     If bufsize < 2 Then
     keyvalue = ""
     retvalue = RegSetValueEx(keyid, subkey, 0&, REG_SZ, ByVal keyvalue, Len(keyvalue) + 1)
     Else
     keyvalue = String(bufsize + 1, " ")
     retvalue = RegQueryValueEx(keyid, subkey, 0&, REG_SZ, ByVal keyvalue, bufsize)
     keyvalue = Left$(keyvalue, bufsize - 1)
     Text2.Text = keyvalue
     End If
     Label5.Caption = keyvalue
     End If
     End Sub
    好了，存盤(pán)，按F5運(yùn)行程序，在兩個(gè)Text中分別寫(xiě)入你的“注冊(cè)姓名”和“注冊(cè)公司”的名稱，然后單擊
    “寫(xiě)入注冊(cè)表”按鈕，現(xiàn)在打開(kāi)“注冊(cè)表編輯器”，找到HKEY_LOCAL_MACHINE\SOFTWARE\My Soft\My Program，看看右邊是不是生成了“注冊(cè)名”和“注冊(cè)公司”兩個(gè)鍵值，是的話，恭喜你，你成功了。