Visual Basic-REGISTRY USAGE

[Computer_Junkie]

does anyone know how to use the Registry class in visual basic?

For example, where(Hkey/blabla) to save the key?

Any help would be greatly appreciated, thanks everyone

[merlin_2]

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dv_vstechart/html/vbtchaccessingregistrywithvisualbasicnet.asp

[mims1979]

Use the following module (its broken up into multiple parts because this forum will not allow me to post a larger post

Code: [Select]


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 RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long
Declare Function RegCreateKey Lib "advapi32.dll" Alias "RegCreateKeyA" (ByVal hKey As Long, ByVal lpSubKey As String, phkResult As Long) As Long
Declare Function RegDeleteKey Lib "advapi32.dll" Alias "RegDeleteKeyA" (ByVal hKey As Long, ByVal lpSubKey As String) 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, ByVal lpData As String, lpcbData As Long) As Long
Declare Function RegQueryValueExA Lib "advapi32.dll" (ByVal hKey As Long, ByVal lpValueName As String, ByVal lpReserved As Long, lpType As Long, ByRef lpData As Long, lpcbData As Long) As Long
Declare Function RegSetValueEx Lib "advapi32.dll" 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
Declare Function RegSetValueExA Lib "advapi32.dll" (ByVal hKey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, ByRef lpData As Long, ByVal cbData As Long) As Long
Declare Function RegSetValueExB Lib "advapi32.dll" Alias "RegSetValueExA" (ByVal hKey As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, ByRef lpData As Byte, 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_OUTOFMEMORY = 14&
Const ERROR_INVALID_PARAMETER = 87&
Const ERROR_ACCESS_DENIED = 5&
Const ERROR_NO_MORE_ITEMS = 259&
Const ERROR_MORE_DATA = 234&

Const REG_NONE = 0&
Const REG_SZ = 1&
Const REG_EXPAND_SZ = 2&
Const REG_BINARY = 3&
Const REG_DWORD = 4&
Const REG_DWORD_LITTLE_ENDIAN = 4&
Const REG_DWORD_BIG_ENDIAN = 5&
Const REG_LINK = 6&
Const REG_MULTI_SZ = 7&
Const REG_RESOURCE_LIST = 8&
Const REG_FULL_RESOURCE_DESCRIPTOR = 9&
Const REG_RESOURCE_REQUIREMENTS_LIST = 10&

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 READ_CONTROL = &H20000
Const WRITE_DAC = &H40000
Const WRITE_OWNER = &H80000
Const SYNCHRONIZE = &H100000
Const STANDARD_RIGHTS_REQUIRED = &HF0000
Const STANDARD_RIGHTS_READ = READ_CONTROL
Const STANDARD_RIGHTS_WRITE = READ_CONTROL
Const STANDARD_RIGHTS_EXECUTE = READ_CONTROL
Const KEY_READ = STANDARD_RIGHTS_READ Or KEY_QUERY_VALUE Or KEY_ENUMERATE_SUB_KEYS Or KEY_NOTIFY
Const KEY_WRITE = STANDARD_RIGHTS_WRITE Or KEY_SET_VALUE Or KEY_CREATE_SUB_KEY
Const KEY_EXECUTE = KEY_READ

Dim hKey As Long, MainKeyHandle As Long
Dim rtn As Long, lBuffer As Long, sBuffer As String
Dim lBufferSize As Long
Dim lDataSize As Long
Dim ByteArray() As Byte

'This constant determins wether or not to display error messages to the
'user. I have set the default value to False as an error message can and
'does become irritating after a while. Turn this value to true if you want
'to debug your programming code when reading and writing to your system
'registry, as any errors will be displayed in a message box.

Const DisplayErrorMsg = False



[mims1979]

Code: [Select]



Function SetDWORDValue(SubKey As String, Entry As String, Value As Long)

Call ParseKey(SubKey, MainKeyHandle)

If MainKeyHandle Then
  rtn = RegOpenKeyEx(MainKeyHandle, SubKey, 0, KEY_WRITE, hKey) 'open the key
  If rtn = ERROR_SUCCESS Then 'if the key was open successfully then
     rtn = RegSetValueExA(hKey, Entry, 0, REG_DWORD, Value, 4) 'write the value
     If Not rtn = ERROR_SUCCESS Then   'if there was an error writting the value
        If DisplayErrorMsg = True Then 'if the user want errors displayed
           MsgBox ErrorMsg(rtn)        'display the error
        End If
     End If
     rtn = RegCloseKey(hKey) 'close the key
  Else 'if there was an error opening the key
     If DisplayErrorMsg = True Then 'if the user want errors displayed
        MsgBox ErrorMsg(rtn) 'display the error
     End If
  End If
End If

End Function
Function GetDWORDValue(SubKey As String, Entry As String)

Call ParseKey(SubKey, MainKeyHandle)

If MainKeyHandle Then
  rtn = RegOpenKeyEx(MainKeyHandle, SubKey, 0, KEY_READ, hKey) 'open the key
  If rtn = ERROR_SUCCESS Then 'if the key could be opened then
     rtn = RegQueryValueExA(hKey, Entry, 0, REG_DWORD, lBuffer, 4) 'get the value from the registry
     If rtn = ERROR_SUCCESS Then 'if the value could be retreived then
        rtn = RegCloseKey(hKey)  'close the key
        GetDWORDValue = lBuffer  'return the value
     Else                        'otherwise, if the value couldnt be retreived
        GetDWORDValue = "Error"  'return Error to the user
        If DisplayErrorMsg = True Then 'if the user wants errors displayed
           MsgBox ErrorMsg(rtn)        'tell the user what was wrong
        End If
     End If
  Else 'otherwise, if the key couldnt be opened
     GetDWORDValue = "Error"        'return Error to the user
     If DisplayErrorMsg = True Then 'if the user wants errors displayed
        MsgBox ErrorMsg(rtn)        'tell the user what was wrong
     End If
  End If
End If

End Function
Function SetBinaryValue(SubKey As String, Entry As String, Value As String)



[mims1979]

Code: [Select]


Call ParseKey(SubKey, MainKeyHandle)

If MainKeyHandle Then
  rtn = RegOpenKeyEx(MainKeyHandle, SubKey, 0, KEY_WRITE, hKey) 'open the key
  If rtn = ERROR_SUCCESS Then 'if the key was open successfully then
     lDataSize = Len(Value)
     ReDim ByteArray(lDataSize)
     For i = 1 To lDataSize
     ByteArray(i) = Asc(Mid$(Value, i, 1))
     Next
     rtn = RegSetValueExB(hKey, Entry, 0, REG_BINARY, ByteArray(1), lDataSize) 'write the value
     If Not rtn = ERROR_SUCCESS Then   'if the was an error writting the value
        If DisplayErrorMsg = True Then 'if the user want errors displayed
           MsgBox ErrorMsg(rtn)        'display the error
        End If
     End If
     rtn = RegCloseKey(hKey) 'close the key
  Else 'if there was an error opening the key
     If DisplayErrorMsg = True Then 'if the user wants errors displayed
        MsgBox ErrorMsg(rtn) 'display the error
     End If
  End If
End If

End Function


Function GetBinaryValue(SubKey As String, Entry As String)

Call ParseKey(SubKey, MainKeyHandle)

If MainKeyHandle Then
  rtn = RegOpenKeyEx(MainKeyHandle, SubKey, 0, KEY_READ, hKey) 'open the key
  If rtn = ERROR_SUCCESS Then 'if the key could be opened
     lBufferSize = 1
     rtn = RegQueryValueEx(hKey, Entry, 0, REG_BINARY, 0, lBufferSize) 'get the value from the registry
     sBuffer = Space(lBufferSize)
     rtn = RegQueryValueEx(hKey, Entry, 0, REG_BINARY, sBuffer, lBufferSize) 'get the value from the registry
     If rtn = ERROR_SUCCESS Then 'if the value could be retreived then
        rtn = RegCloseKey(hKey)  'close the key
        GetBinaryValue = sBuffer 'return the value to the user
     Else                        'otherwise, if the value couldnt be retreived
        GetBinaryValue = "Error" 'return Error to the user
        If DisplayErrorMsg = True Then 'if the user wants to errors displayed
           MsgBox ErrorMsg(rtn)  'display the error to the user
        End If
     End If
  Else 'otherwise, if the key couldnt be opened
     GetBinaryValue = "Error" 'return Error to the user
     If DisplayErrorMsg = True Then 'if the user wants to errors displayed
        MsgBox ErrorMsg(rtn)  'display the error to the user
     End If
  End If
End If

End Function
Function DeleteKey(Keyname As String)

Call ParseKey(Keyname, MainKeyHandle)

If MainKeyHandle Then
  rtn = RegOpenKeyEx(MainKeyHandle, Keyname, 0, KEY_WRITE, hKey) 'open the key
  If rtn = ERROR_SUCCESS Then 'if the key could be opened then
     rtn = RegDeleteKey(hKey, Keyname) 'delete the key
     rtn = RegCloseKey(hKey)  'close the key
  End If
End If

End Function



[mims1979]

Code: [Select]


Function GetMainKeyHandle(MainKeyName As String) As Long

Const HKEY_CLASSES_ROOT = &H80000000
Const HKEY_CURRENT_USER = &H80000001
Const HKEY_LOCAL_MACHINE = &H80000002
Const HKEY_USERS = &H80000003
Const HKEY_PERFORMANCE_DATA = &H80000004
Const HKEY_CURRENT_CONFIG = &H80000005
Const HKEY_DYN_DATA = &H80000006
 
Select Case MainKeyName
      Case "HKEY_CLASSES_ROOT"
           GetMainKeyHandle = HKEY_CLASSES_ROOT
      Case "HKEY_CURRENT_USER"
           GetMainKeyHandle = HKEY_CURRENT_USER
      Case "HKEY_LOCAL_MACHINE"
           GetMainKeyHandle = HKEY_LOCAL_MACHINE
      Case "HKEY_USERS"
           GetMainKeyHandle = HKEY_USERS
      Case "HKEY_PERFORMANCE_DATA"
           GetMainKeyHandle = HKEY_PERFORMANCE_DATA
      Case "HKEY_CURRENT_CONFIG"
           GetMainKeyHandle = HKEY_CURRENT_CONFIG
      Case "HKEY_DYN_DATA"
           GetMainKeyHandle = HKEY_DYN_DATA
End Select

End Function

Function ErrorMsg(lErrorCode As Long) As String
   
'If an error does accurr, and the user wants error messages displayed, then
'display one of the following error messages

Select Case lErrorCode
      Case 1009, 1015
           GetErrorMsg = "The Registry Database is corrupt!"
      Case 2, 1010
           GetErrorMsg = "Bad Key Name"
      Case 1011
           GetErrorMsg = "Can't Open Key"
      Case 4, 1012
           GetErrorMsg = "Can't Read Key"
      Case 5
           GetErrorMsg = "Access to this key is denied"
      Case 1013
           GetErrorMsg = "Can't Write Key"
      Case 8, 14
           GetErrorMsg = "Out of memory"
      Case 87
           GetErrorMsg = "Invalid Parameter"
      Case 234
           GetErrorMsg = "There is more data than the buffer has been allocated to hold."
      Case Else
           GetErrorMsg = "Undefined Error Code:  " & Str$(lErrorCode)
End Select

End Function

Function GetStringValue(SubKey As String, Entry As String)

Call ParseKey(SubKey, MainKeyHandle)

If MainKeyHandle Then
  rtn = RegOpenKeyEx(MainKeyHandle, SubKey, 0, KEY_READ, hKey) 'open the key
  If rtn = ERROR_SUCCESS Then 'if the key could be opened then
     sBuffer = Space(255)     'make a buffer
     lBufferSize = Len(sBuffer)
     rtn = RegQueryValueEx(hKey, Entry, 0, REG_SZ, sBuffer, lBufferSize) 'get the value from the registry
     If rtn = ERROR_SUCCESS Then 'if the value could be retreived then
        rtn = RegCloseKey(hKey)  'close the key
        sBuffer = Trim(sBuffer)
        GetStringValue = Left(sBuffer, Len(sBuffer) - 1) 'return the value to the user
     Else                        'otherwise, if the value couldnt be retreived
        GetStringValue = "Error" 'return Error to the user
        If DisplayErrorMsg = True Then 'if the user wants errors displayed then
           MsgBox ErrorMsg(rtn)  'tell the user what was wrong
        End If
     End If
  Else 'otherwise, if the key couldnt be opened
     GetStringValue = "Error"       'return Error to the user
     If DisplayErrorMsg = True Then 'if the user wants errors displayed then
        MsgBox ErrorMsg(rtn)        'tell the user what was wrong
     End If
  End If
End If

End Function

Private Sub ParseKey(Keyname As String, Keyhandle As Long)
   
rtn = InStr(Keyname, "\") 'return if "\" is contained in the Keyname

If Left(Keyname, 5) <> "HKEY_" Or Right(Keyname, 1) = "\" Then 'if the is a "\" at the end of the Keyname then
  MsgBox "Incorrect Format:" + Chr(10) + Chr(10) + Keyname 'display error to the user
  Exit Sub 'exit the procedure
ElseIf rtn = 0 Then 'if the Keyname contains no "\"
  Keyhandle = GetMainKeyHandle(Keyname)
  Keyname = "" 'leave Keyname blank
Else 'otherwise, Keyname contains "\"
  Keyhandle = GetMainKeyHandle(Left(Keyname, rtn - 1)) 'seperate the Keyname
  Keyname = Right(Keyname, Len(Keyname) - rtn)
End If

End Sub
Function CreateKey(SubKey As String)

Call ParseKey(SubKey, MainKeyHandle)

If MainKeyHandle Then
  rtn = RegCreateKey(MainKeyHandle, SubKey, hKey) 'create the key
  If rtn = ERROR_SUCCESS Then 'if the key was created then
     rtn = RegCloseKey(hKey)  'close the key
  End If
End If

End Function
Function SetStringValue(SubKey As String, Entry As String, Value As String)

Call ParseKey(SubKey, MainKeyHandle)

If MainKeyHandle Then
  rtn = RegOpenKeyEx(MainKeyHandle, SubKey, 0, KEY_WRITE, hKey) 'open the key
  If rtn = ERROR_SUCCESS Then 'if the key was open successfully then
     rtn = RegSetValueEx(hKey, Entry, 0, REG_SZ, ByVal Value, Len(Value)) 'write the value
     If Not rtn = ERROR_SUCCESS Then   'if there was an error writting the value
        If DisplayErrorMsg = True Then 'if the user wants errors displayed
           MsgBox ErrorMsg(rtn)        'display the error
        End If
     End If
     rtn = RegCloseKey(hKey) 'close the key
  Else 'if there was an error opening the key
     If DisplayErrorMsg = True Then 'if the user wants errors displayed
        MsgBox ErrorMsg(rtn)        'display the error
     End If
  End If
End If

End Function