如何用 Visual Basic 读出、写入和删除注册表键值？
添加类模块，添加代码：
Option Explicit
'******************************************
Global Const REG_SZ As Long = 1
Global Const REG_DWORD As Long = 4
Global Const HKEY_CLASSES_ROOT = &H80000000
Global Const HKEY_CURRENT_USER = &H80000001
Global Const HKEY_LOCAL_MACHINE = &H80000002
Global Const HKEY_USERS = ...全部
添加类模块，添加代码：
Option Explicit
'******************************************
Global Const REG_SZ As Long = 1
Global Const REG_DWORD As Long = 4
Global Const HKEY_CLASSES_ROOT = &H80000000
Global Const HKEY_CURRENT_USER = &H80000001
Global Const HKEY_LOCAL_MACHINE = &H80000002
Global Const HKEY_USERS = &H80000003
Global Const HUser = HKEY_CURRENT_USER
Global Const HLoMac = HKEY_LOCAL_MACHINE
Global Const Hk_u = HKEY_USERS
Global Const ERROR_NONE = 0
Global Const ERROR_BADDB = 1
Global Const ERROR_BADKEY = 2
Global Const ERROR_CANTOPEN = 3
Global Const ERROR_CANTREAD = 4
Global Const ERROR_CANTWRITE = 5
Global Const ERROR_OUTOFMEMORY = 6
Global Const ERROR_INVALID_PARAMETER = 7
Global Const ERROR_ACCESS_DENIED = 8
Global Const ERROR_INVALID_PARAMETERS = 87
Global Const ERROR_NO_MORE_ITEMS = 259
Global Const KEY_ALL_ACCESS = &H3F
Global Const REG_OPTION_NON_VOLATILE = 0
Declare Function RegCloseKey Lib "advapi32。
dll" (ByVal Hkey As Long) As Long
Declare Function RegCreateKeyEx Lib "advapi32。dll" Alias "RegCreateKeyExA" (ByVal Hkey As Long, ByVal lpSubKey As String, ByVal Reserved As Long, ByVal lpClass As String, ByVal dwOptions As Long, ByVal samDesired As Long, ByVal lpSecurityAttributes As Long, phkResult As Long, lpdwDisposition As Long) As Long
Declare Function RegOpenKeyEx Lib "advapi32。
dll" Alias "RegOpenKeyExA" (ByVal Hkey As Long, ByVal lpSubKey As String, ByVal ulOptions As Long, ByVal samDesired As Long, phkResult As Long) As Long
Declare Function RegQueryValueExString Lib "advapi32。
dll" Alias "RegQueryValueExA" (ByVal Hkey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, ByVal lpData As String, lpcbData As Long) As Long
Declare Function RegQueryValueExLong Lib "advapi32。
dll" Alias "RegQueryValueExA" (ByVal Hkey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, lpData As Long, lpcbData As Long) As Long
Declare Function RegQueryValueExNULL Lib "advapi32。
dll" Alias "RegQueryValueExA" (ByVal Hkey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, ByVal lpData As Long, lpcbData As Long) As Long
Declare Function RegSetValueExString Lib "advapi32。
dll" Alias "RegSetValueExA" (ByVal Hkey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, ByVal lpValue As String, ByVal cbData As Long) As Long
Declare Function RegSetValueExLong Lib "advapi32。
dll" Alias "RegSetValueExA" (ByVal Hkey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, lpValue As Long, ByVal cbData As Long) As Long
Private Declare Function RegDeleteKey& Lib "advapi32。
dll" Alias "RegDeleteKeyA" (ByVal Hkey As Long, ByVal lpSubKey As String)
Private Declare Function RegDeleteValue& Lib "advapi32。
dll" Alias "RegDeleteValueA" (ByVal Hkey As Long, ByVal lpValueName As String)
Public Declare Function SetWindowPos Lib "user32" (ByVal hwnd As Long, ByVal hWndInsertAfter As Long, ByVal x As Long, ByVal y As Long, ByVal cx As Long, ByVal cy As Long, ByVal wFlags As Long) As Long
Public Const HWND_TOPMOST = -1
Public Const SWP_NOSIZE = &H1
Public Const SWP_NOMOVE = &H2
Public Const HWND_TOP = 0
Public Const HWND_NOTOPMOST = -2
Public Const HWND_BOTTOM = 1
Public Declare Function RegEnumValue Lib "advapi32。
dll" Alias "RegEnumValueA" (ByVal Hkey As Long, ByVal dwIndex As Long, ByVal lpValueName As String, lpcbValueName As Long, ByVal lpReserved As Long, lpType As Long, lpData As Byte, lpcbData As Long) As Long
'删除主键 DeleteKey HKEY_CURRENT_USER, "Software\Microsoft\Internet Explorer\Toolbar"
Public Function DeleteKey(lPredefinedKey As Long, sKeyName As String)
Dim lRetVal As Long
Dim Hkey As Long
lRetVal = RegOpenKeyEx(lPredefinedKey, sKeyName, 0, KEY_ALL_ACCESS, Hkey)
lRetVal = RegDeleteKey(lPredefinedKey, sKeyName)
RegCloseKey (Hkey)
End Function
'删除键值 DeleteValue HKEY_LOCAL_MACHINE, "Software\Microsoft\Windows\CurrentVersion\Run", "键名"
Public Function DeleteValue(lPredefinedKey As Long, sKeyName As String, sValueName As String)
Dim lRetVal As Long
Dim Hkey As Long
lRetVal = RegOpenKeyEx(lPredefinedKey, sKeyName, 0, KEY_ALL_ACCESS, Hkey)
lRetVal = RegDeleteValue(Hkey, sValueName)
RegCloseKey (Hkey)
End Function
Public Function SetValueEx(ByVal Hkey As Long, sValueName As String, lType As Long, vValue As Variant) As Long
Dim lValue As Long
Dim sValue As String
Select Case lType
Case REG_SZ
sValue = vValue
SetValueEx = RegSetValueExString(Hkey, sValueName, 0&, lType, sValue, Len(sValue))
Case REG_DWORD
lValue = vValue
SetValueEx = RegSetValueExLong(Hkey, sValueName, 0&, lType, lValue, 4)
End Select
End Function
Function QueryValueEx(ByVal LHkey As Long, ByVal szValueName As String, vValue As Variant) As Long
Dim cch As Long
Dim lrc As Long
Dim lType As Long
Dim lValue As Long
Dim sValue As String
On Error GoTo QueryValueExError
lrc = RegQueryValueExNULL(LHkey, szValueName, 0&, lType, 0&, cch)
If lrc <> ERROR_NONE Then Error 5
Select Case lType
Case REG_SZ:
sValue = String(cch, 0)
lrc = RegQueryValueExString(LHkey, szValueName, 0&, lType, sValue, cch)
If lrc = ERROR_NONE Then
vValue = Left$(sValue, cch)
Else
vValue = Empty
End If
Case REG_DWORD:
lrc = RegQueryValueExLong(LHkey, szValueName, 0&, lType, lValue, cch)
If lrc = ERROR_NONE Then vValue = lValue
Case Else
lrc = -1
End Select
QueryValueExExit:
QueryValueEx = lrc
Exit Function
QueryValueExError:
Resume QueryValueExExit
End Function
'新建主键 例：CreateNewKey HKEY_LOCAL_MACHINE, "Software\Microsoft\Windows\CurrentVersion\Run"
Public Function CreateNewKey(lPredefinedKey As Long, sNewKeyName As String)
Dim hNewKey As Long
Dim lRetVal As Long
lRetVal = RegCreateKeyEx(lPredefinedKey, sNewKeyName, 0&, vbNullString, REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, 0&, hNewKey, lRetVal)
RegCloseKey (hNewKey)
End Function
'对键赋值 例：SetKeyValue HKEY_LOCAL_MACHINE, "Software\Microsoft\Windows\CurrentVersion\Run", "健名", "程序。
exe", REG_SZ
Public Function SetKeyValue(lPredefinedKey As Long, sKeyName As String, sValueName As String, vValueSetting As Variant, lValueType As Long)
Dim lRetVal As Long
Dim Hkey As Long
lRetVal = RegOpenKeyEx(lPredefinedKey, sKeyName, 0, KEY_ALL_ACCESS, Hkey)
lRetVal = SetValueEx(Hkey, sValueName, lValueType, vValueSetting)
RegCloseKey (Hkey)
End Function
'读取键值 例：QueryValue(HKEY_LOCAL_MACHINE, "Software\Microsoft\Windows\CurrentVersion\Run", "键名"))
Public Function QueryValue(lPredefinedKey As Long, sKeyName As String, sValueName As String)
Dim lRetVal As Long
Dim Hkey As Long
Dim vValue As Variant
lRetVal = RegOpenKeyEx(lPredefinedKey, sKeyName, 0, KEY_ALL_ACCESS, Hkey)
lRetVal = QueryValueEx(Hkey, sValueName, vValue)
QueryValue = vValue
RegCloseKey (Hkey)
End Function。
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