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Read Or Write registry

by Thejan J Rajapakshe (7 Submissions)
Category: Registry
Compatability: VB 6.0
Difficulty: Unknown Difficulty
Originally Published: Wed 3^rd January 2007
Date Added: Mon 8^th February 2021
Rating: (1 Votes)

Read Or Write registry

API Declarations



Public Const READ_CONTROL = &H20000
Public Const STANDARD_RIGHTS_READ = (READ_CONTROL)
Public Const STANDARD_RIGHTS_WRITE = (READ_CONTROL)
Public Const KEY_QUERY_VALUE = &H1
Public Const KEY_SET_VALUE = &H2
Public Const KEY_CREATE_SUB_KEY = &H4
Public Const KEY_ENUMERATE_SUB_KEYS = &H8
Public Const KEY_NOTIFY = &H10
Public Const KEY_CREATE_LINK = &H20
Public Const SYNCHRONIZE = &H100000
Public Const STANDARD_RIGHTS_ALL = &H1F0000
Public Const KEY_READ = ((STANDARD_RIGHTS_READ Or _
KEY_QUERY_VALUE Or KEY_ENUMERATE_SUB_KEYS Or KEY_NOTIFY) _
And (Not SYNCHRONIZE))
Public Const KEY_WRITE = ((STANDARD_RIGHTS_WRITE Or _
KEY_SET_VALUE Or KEY_CREATE_SUB_KEY) And (Not SYNCHRONIZE))
Public Const KEY_ALL_ACCESS = ((STANDARD_RIGHTS_ALL Or _
KEY_QUERY_VALUE Or KEY_SET_VALUE Or KEY_CREATE_SUB_KEY _
Or KEY_ENUMERATE_SUB_KEYS Or KEY_NOTIFY Or KEY_CREATE_LINK) _
And (Not SYNCHRONIZE))
Public Const KEY_EXECUTE = ((KEY_READ) And (Not SYNCHRONIZE))

Public Const ERROR_SUCCESS = 0&

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 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
Declare Function RegCloseKey Lib "advapi32.dll" _
(ByVal hKey As Long) As Long




'Module Function-------------------------------------------------------------------------------

'Function sdaGetRegEntry(strKey As String, _
strSubKeys As String, strValName As String, _
lngType As Long) As String
'* Demonstration of win32 API's to query
' the system registry
' Stu Alderman -- 2/30/96

On Error GoTo sdaGetRegEntry_Err

Dim lngResult As Long, lngKey As Long
Dim lngHandle As Long, lngcbData As Long
Dim strRet As String

Select Case strKey
Case "HKEY_CLASSES_ROOT": lngKey = &H80000000
Case "HKEY_CURRENT_CONFIG": lngKey = &H80000005
Case "HKEY_CURRENT_USER": lngKey = &H80000001
Case "HKEY_DYN_DATA": lngKey = &H80000006
Case "HKEY_LOCAL_MACHINE": lngKey = &H80000002
Case "HKEY_PERFORMANCE_DATA": lngKey = &H80000004
Case "HKEY_USERS": lngKey = &H80000003
Case Else: Exit Function
End Select

If Not ERROR_SUCCESS = RegOpenKeyEx(lngKey, _
strSubKeys, 0&, KEY_READ, _
lngHandle) Then Exit Function

lngResult = RegQueryValueEx(lngHandle, strValName, _
0&, lngType, ByVal strRet, lngcbData)
strRet = Space(lngcbData)
lngResult = RegQueryValueEx(lngHandle, strValName, _
0&, lngType, ByVal strRet, lngcbData)

If Not ERROR_SUCCESS = RegCloseKey(lngHandle) Then _
lngType = -1&

sdaGetRegEntry = strRet

sdaGetRegEntry_Exit:
On Error GoTo 0
Exit Function

sdaGetRegEntry_Err:
lngType = -1&
MsgBox Err & "> " & Error$, 16, _
"GenUtils/sdaGetRegEntry"
Resume sdaGetRegEntry_Exit

'End Function



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