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Attribute VB_Name = "RegKeys" '»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»' ' This module reads and writes registry keys. Unlike the ' ' internal registry access methods of VB, it can read and ' ' write any registry keys with string values. ' '_________________________________________________________' Option Explicit '»»»»»»»»»»»»»»»»»»»»»»»»»»»»»»' ' Registry API Declarations... ' '______________________________' Private Declare Function RegCloseKey Lib "advapi32" (ByVal hKey As Long) As Long Private 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, ByRef lpSecurityAttributes As SECURITY_ATTRIBUTES, ByRef phkResult As Long, ByRef lpdwDisposition As Long) As Long Private Declare Function RegOpenKeyEx Lib "advapi32" Alias "RegOpenKeyExA" (ByVal hKey As Long, ByVal lpSubKey As String, ByVal ulOptions As Long, ByVal samDesired As Long, ByRef phkResult As Long) As Long Private Declare Function RegQueryValueEx Lib "advapi32" Alias "RegQueryValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, ByRef lpType As Long, ByVal lpData As String, ByRef lpcbData As Long) As Long Private Declare Function RegSetValueEx Lib "advapi32" Alias "RegSetValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, ByVal lpData As String, ByVal cbData As Long) As Long '--------------------------------------------------------------- '- Registry Api Constants... '--------------------------------------------------------------- ' Reg Data Types... Const REG_SZ = 1 ' Unicode nul terminated string Const REG_EXPAND_SZ = 2 ' Unicode nul terminated string Const REG_DWORD = 4 ' 32-bit number ' Reg Create Type Values... Const REG_OPTION_NON_VOLATILE = 0 ' Key is preserved when system is rebooted ' Reg Key Security Options... Const READ_CONTROL = &H20000 Const KEY_QUERY_VALUE = &H1 Const KEY_SET_VALUE = &H2 Const KEY_CREATE_SUB_KEY = &H4 Const KEY_ENUMERATE_SUB_KEYS = &H8 Const KEY_NOTIFY = &H10 Const KEY_CREATE_LINK = &H20 Const KEY_READ = KEY_QUERY_VALUE + KEY_ENUMERATE_SUB_KEYS + KEY_NOTIFY + READ_CONTROL Const KEY_WRITE = KEY_SET_VALUE + KEY_CREATE_SUB_KEY + READ_CONTROL Const KEY_EXECUTE = KEY_READ Const KEY_ALL_ACCESS = KEY_QUERY_VALUE + KEY_SET_VALUE + _ KEY_CREATE_SUB_KEY + KEY_ENUMERATE_SUB_KEYS + _ KEY_NOTIFY + KEY_CREATE_LINK + READ_CONTROL ' Reg Key ROOT Types... 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 HKEY_PERFORMANCE_DATA = &H80000004 ' Return Value... Public Const ERROR_NONE = 0 Public Const ERROR_BADKEY = 2 Public Const ERROR_ACCESS_DENIED = 8 Public Const ERROR_SUCCESS = 0 '--------------------------------------------------------------- '- Registry Security Attributes TYPE... '--------------------------------------------------------------- Private Type SECURITY_ATTRIBUTES nLength As Long lpSecurityDescriptor As Long bInheritHandle As Boolean End Type '------------------------------------------------------------------------------------------------- 'sample usage - Debug.Print UpodateKey(HKEY_CLASSES_ROOT, "keyname", "newvalue") '------------------------------------------------------------------------------------------------- Public Function UpdateKey(KeyRoot As Long, KeyName As String, SubKeyName As String, SubKeyValue As String) As Boolean Dim rc As Long ' Return Code Dim hKey As Long ' Handle To A Registry Key Dim hDepth As Long ' Dim lpAttr As SECURITY_ATTRIBUTES ' Registry Security Type lpAttr.nLength = 50 ' Set Security Attributes To Defaults... lpAttr.lpSecurityDescriptor = 0 ' ... lpAttr.bInheritHandle = True ' ... '------------------------------------------------------------ '- Create/Open Registry Key... '------------------------------------------------------------ rc = RegCreateKeyEx(KeyRoot, KeyName, _ 0, REG_SZ, _ REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, lpAttr, _ hKey, hDepth) ' Create/Open //KeyRoot//KeyName If (rc <> ERROR_SUCCESS) Then GoTo CreateKeyError ' Handle Errors... '------------------------------------------------------------ '- Create/Modify Key Value... '------------------------------------------------------------ If (SubKeyValue = "") Then SubKeyValue = " " ' A Space Is Needed For RegSetValueEx() To Work... ' Create/Modify Key Value rc = RegSetValueEx(hKey, SubKeyName, _ 0, REG_SZ, _ SubKeyValue, LenB(StrConv(SubKeyValue, vbFromUnicode))) If (rc <> ERROR_SUCCESS) Then GoTo CreateKeyError ' Handle Error '------------------------------------------------------------ '- Close Registry Key... '------------------------------------------------------------ rc = RegCloseKey(hKey) ' Close Key UpdateKey = True ' Return Success Exit Function ' Exit CreateKeyError: UpdateKey = False ' Set Error Return Code rc = RegCloseKey(hKey) ' Attempt To Close Key End Function '------------------------------------------------------------------------------------------------- 'sample usage - Debug.Print GetKeyValue(HKEY_CLASSES_ROOT, "COMCTL.ListviewCtrl.1\CLSID", "") '------------------------------------------------------------------------------------------------- Public Function GetKeyValue(KeyRoot As Long, KeyName As String, SubKeyRef As String) As String Dim i As Long ' Loop Counter Dim rc As Long ' Return Code Dim hKey As Long ' Handle To An Open Registry Key Dim hDepth As Long ' Dim sKeyVal As String Dim lKeyValType As Long ' Data Type Of A Registry Key Dim tmpVal As String ' Tempory Storage For A Registry Key Value Dim KeyValSize As Long ' Size Of Registry Key Variable ' Open RegKey Under KeyRoot {HKEY_LOCAL_MACHINE...} '------------------------------------------------------------ rc = RegOpenKeyEx(KeyRoot, KeyName, 0, KEY_ALL_ACCESS, hKey) ' Open Registry Key If (rc <> ERROR_SUCCESS) Then GoTo GetKeyError ' Handle Error... tmpVal = String$(1024, 0) ' Allocate Variable Space KeyValSize = 1024 ' Mark Variable Size '------------------------------------------------------------ ' Retrieve Registry Key Value... '------------------------------------------------------------ rc = RegQueryValueEx(hKey, SubKeyRef, 0, _ lKeyValType, tmpVal, KeyValSize) ' Get/Create Key Value If (rc <> ERROR_SUCCESS) Then GoTo GetKeyError ' Handle Errors tmpVal = Left$(tmpVal, InStr(tmpVal, Chr(0)) - 1) '------------------------------------------------------------ ' Determine Key Value Type For Conversion... '------------------------------------------------------------ Select Case lKeyValType ' Search Data Types... Case REG_SZ, REG_EXPAND_SZ ' String Registry Key Data Type sKeyVal = tmpVal ' Copy String Value Case REG_DWORD ' Double Word Registry Key Data Type For i = Len(tmpVal) To 1 Step -1 ' Convert Each Bit sKeyVal = sKeyVal + Hex(Asc(Mid(tmpVal, i, 1))) ' Build Value Char. By Char. Next sKeyVal = Format$("&h" + sKeyVal) ' Convert Double Word To String End Select GetKeyValue = sKeyVal ' Return Value rc = RegCloseKey(hKey) ' Close Registry Key Exit Function ' Exit GetKeyError: ' Cleanup After An Error Has Occured... GetKeyValue = vbNullString ' Set Return Val To Empty String rc = RegCloseKey(hKey) ' Close Registry Key End Function 
