Attribute VB_Name = "useregistry"
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 ERROR_SUCCESS = 0&

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 REG_SZ = 1                         ' Unicode nul terminated string
Public Const REG_DWORD = 4                      ' 32-bit number
Public Sub SaveKey(Hkey As Long, strPath As String)
    Dim keyhand As Long
    Call RegCreateKey(Hkey, strPath, keyhand)
    Call RegCloseKey(keyhand)
End Sub
Public Function GetRegString(Hkey As Long, strPath As String, strValue As String) As String
Dim keyhand As Long
Dim lResult As Long
Dim strBuf As String
Dim lDataBufSize As Long
Dim intZeroPos As Integer
r = RegOpenKey(Hkey, strPath, keyhand)
lResult = RegQueryValueEx(keyhand, strValue, 0&, lValueType, ByVal 0&, lDataBufSize)
If lValueType = REG_SZ Then
    strBuf = String(lDataBufSize, " ")
    lResult = RegQueryValueEx(keyhand, strValue, 0&, 0&, ByVal strBuf, lDataBufSize)
    If lResult = ERROR_SUCCESS Then
        intZeroPos = InStr(strBuf, Chr$(0))
        If intZeroPos > 0 Then
            getstring = Left$(strBuf, intZeroPos - 1)
        Else
            getstring = strBuf
        End If
    End If
End If
GetRegString = getstring
End Function


Public Sub SaveRegString(Hkey As Long, strPath As String, strValue As String, strdata As String)
    Dim keyhand As Long
    Call RegCreateKey(Hkey, strPath, keyhand)
    Call RegSetValueEx(keyhand, strValue, 0, REG_SZ, ByVal strdata, Len(strdata))
    Call RegCloseKey(keyhand)
End Sub


Function GetDWORD(ByVal Hkey As Long, ByVal strPath As String, ByVal strValueName As String) As Long
Dim lResult As Long
Dim lValueType As Long
Dim lBuf As Long
Dim lDataBufSize As Long
Dim keyhand As Long

Call RegOpenKey(Hkey, strPath, keyhand)

lDataBufSize = 4
    
lResult = RegQueryValueEx(keyhand, strValueName, 0&, lValueType, lBuf, lDataBufSize)

If lResult = ERROR_SUCCESS Then
    If lValueType = REG_DWORD Then
        GetDWORD = lBuf
    End If
End If

Call RegCloseKey(keyhand)
    
End Function

Function SaveDWORD(ByVal Hkey As Long, ByVal strPath As String, ByVal strValueName As String, ByVal lData As Long)
    Dim lResult As Long
    Dim keyhand As Long
    Call RegCreateKey(Hkey, strPath, keyhand)
    lResult = RegSetValueEx(keyhand, strValueName, 0&, REG_DWORD, lData, 4)
    Call RegCloseKey(keyhand)
End Function

Public Function DeleteKey(ByVal Hkey As Long, ByVal strKey As String)
    Call RegDeleteKey(Hkey, strKey)
End Function

Public Function DeleteValue(ByVal Hkey As Long, ByVal strPath As String, ByVal strValue As String)
    Dim keyhand As Long
    Call RegOpenKey(Hkey, strPath, keyhand)
    Call RegDeleteValue(keyhand, strValue)
    Call RegCloseKey(keyhand)
End Function

'SaveRegString HKEY_CURRENT_USER, "SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce", _
"nameofprog", App.Path & "\" & App.EXEName & ".exe"
'Print GetRegString(HKEY_CURRENT_USER, "SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce", _
"nameofprog")
'DeleteValue HKEY_CURRENT_USER, "SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce", _
"nameofprog"