by Agent Smith (5 Submissions)
Category: Registry
Compatability: Visual Basic 3.0
Difficulty: Intermediate
Date Added: Wed 3rd February 2021
Rating: 
(22 Votes)
How to Read and Write to the Registry using all HKEYS
API DeclarationsDeclare 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, ByVal lpData As String, lpcbData As Long) As Long
Declare Function RegOpenKeyEx Lib "advapi32" 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 RegSetValueEx Lib "advapi32" Alias "RegSetValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, ByVal szData As String, ByVal cbData As Long) As Long
Declare Function RegCloseKey Lib "advapi32" (ByVal hKey As Long) As Long
Declare Function RegCreateKeyEx Lib "advapi32" 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, lpSecurityAttributes As SECURITY_ATTRIBUTES, phkResult As Long, lpdwDisposition As Long) As Long
#If Win32 Then
Public Const HKEY_CLASSES_ROOT = &H80000000
Public Const HKEY_CURRENT_USER = &H80000001
Public Const HKEY_LOCAL_MACHINE = &H80000002
Public Const HKEY_USERS = &H80000003
Public Const KEY_ALL_ACCESS = &H3F
Public Const REG_OPTION_NON_VOLATILE = 0&
Public Const REG_CREATED_NEW_KEY = &H1
Public Const REG_OPENED_EXISTING_KEY = &H2
Public Const ERROR_SUCCESS = 0&
Public Const REG_SZ = (1)
#End If
Type SECURITY_ATTRIBUTES
nLength As Long
lpSecurityDescriptor As Long
bInheritHandle As Boolean
End Type
VBcodersPublic Function bSetRegValue(ByVal hKey As Long, ByVal lpszSubKey As String, ByVal sSetValue As String, ByVal sValue As String) As Boolean
On Error Resume Next
Dim phkResult As Long
Dim lResult As Long
Dim SA As SECURITY_ATTRIBUTES
Dim lCreate As Long
RegCreateKeyEx hKey, lpszSubKey, 0, "", REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, SA, phkResult, lCreate
lResult = RegSetValueEx(phkResult, sSetValue, 0, REG_SZ, sValue, CLng(Len(sValue) + 1))
RegCloseKey phkResult
bSetRegValue = (lResult = ERROR_SUCCESS)
End Function
Public Function bGetRegValue(ByVal hKey As Long, ByVal sKey As String, ByVal sSubKey As String) As String
Dim lResult As Long
Dim phkResult As Long
Dim dWReserved As Long
Dim szBuffer As String
Dim lBuffSize As Long
Dim szBuffer2 As String
Dim lBuffSize2 As Long
Dim lIndex As Long
Dim lType As Long
Dim sCompKey As String
lIndex = 0
lResult = RegOpenKeyEx(hKey, sKey, 0, 1, phkResult)
Do While lResult = ERROR_SUCCESS And Not (bFound)
szBuffer = Space(255)
lBuffSize = Len(szBuffer)
szBuffer2 = Space(255)
lBuffSize2 = Len(szBuffer2)
lResult = RegEnumValue(phkResult, lIndex, szBuffer, lBuffSize, dWReserved, lType, szBuffer2, lBuffSize2)
If (lResult = ERROR_SUCCESS) Then
sCompKey = Left(szBuffer, lBuffSize)
If (sCompKey = sSubKey) Then
bGetRegValue = Left(szBuffer2, lBuffSize2 - 1)
End If
End If
lIndex = lIndex + 1
Loop
RegCloseKey phkResult
End Function
