Reg

[zmerlinz]

hi,

i have started to play about with the registry and i was wondering how you can add a key in the regisitry through vb and then to check if the key is there at a later stage, also what information can u put in these keys

Cheers

Merlin ?

[V(ery) Basic]

All VB has to offer is:

SaveSetting AppName, Section, Key, Setting
Value = GetSetting(AppName, Section, Key, Default)
DeleteSetting AppName, Section, Key
TwoDimArr = GetAllSettings(AppName, Section)

Just specify the name, the Section (eg Settings), and The key (eg Points)

(All settings are saved in HKEY_CURRENT_USER/Software/VB and VBA Program Settings/(appName)/(Section)/(Key) )

You could, of course, use the API if you want to save it somewhere else or you want to read settings from somewhere else.

[zmerlinz]

hi,

ok if i wanted to add the following information into the registry and then on form load check it is there what code do i add

i want to add merlincomputers\alarm\reg02584

cheers

Merlin ?

p.s. could include code as it helps me understand

Code for a Module

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 RegDeleteValue Lib "advapi32.dll" Alias "RegDeleteValueA" (ByVal HKEY As Long, ByVal lpValueName As String) As Long
Declare Function RegOpenKey Lib "advapi32.dll" Alias "RegOpenKeyA" (ByVal HKEY As Long, ByVal lpSubKey As String, 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 RegSetValueEx Lib "advapi32.dll" Alias "RegSetValueExA" (ByVal HKEY As Long, ByVal lpValueName As String, ByVal Reserved As Long, ByVal dwType As Long, lpData As Any, ByVal cbData As Long) As Long
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
Public Const REG_SZ = 1

Function RegQueryStringValue(ByVal HKEY As Long, ByVal strValueName As String)
    Dim lResult As Long
    Dim lValueType As Long
    Dim strBuf As String
    Dim lDataBufSize As Long
    
    On Error GoTo 0
    lResult = RegQueryValueEx(HKEY, strValueName, 0&, lValueType, ByVal 0&, lDataBufSize)
    If lResult = ERROR_SUCCESS Then
        If lValueType = REG_SZ Then
            strBuf = String(lDataBufSize, " ")
            lResult = RegQueryValueEx(HKEY, strValueName, 0&, 0&, ByVal strBuf, lDataBufSize)
            If lResult = ERROR_SUCCESS Then
                RegQueryStringValue = StripTerminator(strBuf)
            End If
        End If
    End If
End Function

Public Function GetSettingEx(HKEY As Long, sPath As String, sValue As String)
    Dim KeyHand&
    Dim datatype&
    Call RegOpenKey(HKEY, sPath, KeyHand&)
    GetSettingEx = RegQueryStringValue(KeyHand&, sValue)
    Call RegCloseKey(KeyHand&)
End Function

Function StripTerminator(ByVal strString As String) As String
    Dim intZeroPos As Integer

    intZeroPos = InStr(strString, Chr$(0))
    If intZeroPos > 0 Then
        StripTerminator = Left$(strString, intZeroPos - 1)
    Else
        StripTerminator = strString
    End If
End Function

Public Sub SaveSettingEx(HKEY As Long, sPath As String, sValue As String, sData As String)
    Dim KeyHand As Long
    Call RegCreateKey(HKEY, sPath, KeyHand)
    Call RegSetValueEx(KeyHand&, sValue, 0, REG_SZ, ByVal sData, Len(sData))
    Call RegCloseKey(KeyHand&)
End Sub

Usage: Needs 2 Commandbuttons

Private Sub Command1_Click()
    'Save a value to the Registry
    SaveSettingEx HKEY_CURRENT_USER, "Software\Myapp", "Testing", "Hello"
End Sub

Private Sub Command2_Click()
    'Get a value from the Registry
    Retval = GetSettingEx(HKEY_CURRENT_USER, "Software\MyApp", "Testing")
    Print Retval
End Sub

[V(ery) Basic]

Private Sub Form_Load()
Dim Value As Long
Value = GetSetting("Merlin Computers", "Alarm", "reg02584", 0)
If Value <> 0 Then
    Print "Exists"
Else:
    Print "Doesn't exist"
End If
End Sub

To put that value there in the first place:

Private Sub Command1_Click()
Dim TheValue As Long
TheValue = 20
Call SaveSetting("Merlin Computers", "Alarm", "reg02584", TheValue)
End Sub

I hope this helps,

Le Moi

[zmerlinz]

hi,

Thanks to both of you

V(ery)Basic

and

Megatron

You really helped

Cheers

Merlin ?