Hardcore Visual Basic 5.0 (2nd Edition)/Hardcore Visual Basic 5.0 - Second Edition (1997)(Microsoft Press).iso/Code/RegTool.cls

Text File | 1997-06-14 | 12KB | 356 lines

VERSION 1.0 CLASS
BEGIN
  MultiUse = -1  'True
END
Attribute VB_Name = "GRegTool"
Attribute VB_GlobalNameSpace = True
Attribute VB_Creatable = True
Attribute VB_PredeclaredId = False
Attribute VB_Exposed = True
Option Explicit

Public Enum EErrorRegTool
    eeBaseRegTool = 13590   ' RegTool
End Enum

Const sWin = "Software\Microsoft\Windows\"
Const sExp = "CurrentVersion\Explorer\Shell Folders"
Const sWinExp = sWin & sExp
Const sBack = "\"

Function GetRegValue(ByVal hKey As Long, sName As String, _
                     vValue As Variant) As Long
    Dim cData As Long, sData As String, ordType As Long, e As Long
    e = RegQueryValueEx(hKey, sName, pNull, ordType, 0&, cData)
    If e And e <> ERROR_MORE_DATA Then Exit Function
    Select Case ordType
    Case REG_DWORD, REG_DWORD_LITTLE_ENDIAN
        Dim iData As Long
        e = RegQueryValueExInt(hKey, sName, pNull, _
                               ordType, iData, cData)
        vValue = iData

    Case REG_DWORD_BIG_ENDIAN  ' Unlikely, but you never know
        Dim dwData As Long
        e = RegQueryValueExInt(hKey, sName, pNull, _
                               ordType, dwData, cData)
        vValue = MBytes.SwapEndian(dwData)

    Case REG_SZ, REG_MULTI_SZ ' Same thing to Visual Basic
        sData = String$(cData - 1, 0)
        e = RegQueryValueExStr(hKey, sName, pNull, _
                               ordType, sData, cData)
        vValue = sData

    Case REG_EXPAND_SZ
        sData = String$(cData - 1, 0)
        e = RegQueryValueExStr(hKey, sName, pNull, _
                               ordType, sData, cData)
        vValue = MUtility.ExpandEnvStr(sData)

    ' Catch REG_BINARY and anything else
    Case Else
        Dim abData() As Byte
        ReDim abData(cData)
        e = RegQueryValueExByte(hKey, sName, pNull, _
                                ordType, abData(0), cData)
        vValue = abData

    End Select
    GetRegValue = e
End Function

Function CreateRegValue(vValueA As Variant, ByVal hKeyA As Long, _
                        Optional sNameA As String) As Long
    Dim c As Long, e As Long, ordType As Long
    Select Case VarType(vValueA)
    Case vbArray + vbByte
        Dim ab() As Byte
        ab = vValueA
        ordType = REG_BINARY
        c = UBound(ab) - LBound(ab) - 1
        e = RegSetValueExByte(hKeyA, sNameA, pNull, ordType, ab(0), c)

    Case vbLong, vbInteger
        Dim i As Long
        i = vValueA
        ordType = REG_DWORD
        e = RegSetValueExInt(hKeyA, sNameA, pNull, ordType, i, 4)

    Case vbString
        Dim s As String, iPos As Long
        s = vValueA
        ordType = REG_SZ
        ' Assume anything with two non-adjacent percents is expanded string
        iPos = InStr(s, "%")
        If iPos Then
            If InStr(iPos + 2, s, "%") Then ordType = REG_EXPAND_SZ
        End If
        c = Len(s) + 1
        e = RegSetValueExStr(hKeyA, sNameA, pNull, ordType, s, c)

    ' User should convert to a compatible type before calling
    Case Else
        e = ERROR_INVALID_DATA

    End Select
    CreateRegValue = e
End Function

Function GetRegValueNext(ByVal hKey As Long, _
                         i As Long, _
                         sName As String, _
                         vValue As Variant) As Long
    Dim cName As Long, cData As Long, sData As String
    Dim ordType As Long, cJunk As Long, ft As FILETIME
    Static hKeyPrev As Long, cNameMax As Long
    ' When enumerating, cache required data the first time
    If hKeyPrev <> hKey Or cNameMax = 0 Then
        hKeyPrev = hKey
        GetRegValueNext = _
            RegQueryInfoKey(hKey, sNullStr, cJunk, pNull, _
                            cJunk, cJunk, cJunk, cJunk, _
                            cNameMax, cJunk, cJunk, ft)
        If GetRegValueNext Then Exit Function
    End If

    ' Get the value name and type in the first call
    vValue = Empty
    cName = cNameMax + 1
    sName = String$(cName, 0)
    GetRegValueNext = _
        RegEnumValue(hKey, i, sName, cName, _
                     pNull, ordType, pNull, cData)
    If GetRegValueNext Then
        If GetRegValueNext <> ERROR_MORE_DATA Then
            Exit Function
        End If
    End If
    sName = Left$(sName, cName)

    ' Handle each type separately
    Select Case ordType
    Case REG_DWORD, REG_DWORD_LITTLE_ENDIAN
        Dim iData As Long
        GetRegValueNext = _
            RegEnumValueInt(hKey, i, sName, cName + 1, _
                            pNull, ordType, iData, cData)
        vValue = iData

    Case REG_DWORD_BIG_ENDIAN  ' Unlikely, but you never know
        Dim dwData As Long
        GetRegValueNext = _
            RegEnumValueInt(hKey, i, sName, cName + 1, _
                            pNull, ordType, dwData, cData)
        vValue = MBytes.SwapEndian(dwData)

    Case REG_SZ, REG_MULTI_SZ ' Same thing to Visual Basic
        sData = String$(cData - 1, 0)
        GetRegValueNext = _
            RegEnumValueStr(hKey, i, sName, cName + 1, _
                            pNull, ordType, sData, cData)
        vValue = sData

    Case REG_EXPAND_SZ         ' Expand environment variables
        sData = String$(cData - 1, 0)
        GetRegValueNext = _
            RegEnumValueStr(hKey, i, sName, cName + 1, _
                            pNull, ordType, sData, cData)
        vValue = MUtility.ExpandEnvStr(sData)

    Case Else       ' Catch REG_BINARY and anything else
        Dim abData() As Byte
        ReDim abData(cData)
        GetRegValueNext = _
            RegEnumValueByte(hKey, i, sName, cName + 1, _
                             pNull, ordType, _
                             abData(0), cData)
        vValue = abData

    End Select

End Function

Function GetRegNodeNext(ByVal hKey As Long, i As Long, sName As String) As Long
    Dim cName As Long, cJunk As Long, ft As FILETIME
    Static hKeyPrev As Long, cNameMax As Long
    If hKeyPrev <> hKey Or cNameMax = 0 Then
        hKeyPrev = hKey
        GetRegNodeNext = RegQueryInfoKey(hKey, sNullStr, cJunk, pNull, _
                                         cJunk, cNameMax, cJunk, cJunk, _
                                         cJunk, cJunk, cJunk, ft)
        If GetRegNodeNext Then Exit Function
    End If

    cName = cNameMax + 1
    sName = String$(cName, 0)
    GetRegNodeNext = RegEnumKeyEx(hKey, i, sName, cName, _
                                  pNull, sNullStr, cJunk, ft)
    sName = Left$(sName, cName)

End Function

Function CreateRegNode(ByVal hKey As Long, sKeyNew As String, _
                       hKeyNew As Long, Optional fExisted As Boolean, _
                       Optional ByVal afAccess As Long = KEY_ALL_ACCESS _
                       ) As Long
    Dim e As Long, ordResult As Long
    CreateRegNode = RegCreateKeyEx(hKey, sKeyNew, 0&, sEmpty, _
                                   REG_OPTION_NON_VOLATILE, _
                                   afAccess, pNull, _
                                   hKeyNew, ordResult)
    fExisted = (ordResult = REG_OPENED_EXISTING_KEY)
End Function

' Delete node, but only if it has no subnodes (emulate WinNT RegDeleteKey)
Function DeleteOneRegNode(ByVal hKeyRoot As Long, sKey As String) As Long
    If MUtility.IsNT Then
        DeleteOneRegNode = RegDeleteKey(hKeyRoot, sKey)
    Else
        ' Check to see if there are subnodes
        Dim cJunk As Long, e As Long, cNode As Long, ft As FILETIME
        e = RegQueryInfoKey(hKeyRoot, sNullStr, cJunk, _
                            pNull, cNode, cJunk, cJunk, _
                            cJunk, cJunk, cJunk, cJunk, ft)
        ' Delete only if no nodes
        If cNode = 0 Then
            DeleteOneRegNode = RegDeleteKey(hKeyRoot, sKey)
        Else
            DeleteOneRegNode = ERROR_ACCESS_DENIED
        End If
    End If
End Function

' Delete node and all its subnodes (emulate Win95 RegDeleteKey)
Function DeleteRegNodes(ByVal hKeyRoot As Long, sKey As String) As Long
    Dim sKeyT As String, hSubKey As Long, ft As FILETIME

    ' Try to delete whole thing--always works for Win95, but fails on
    ' nodes with subnodes in WinNT
    DeleteRegNodes = RegDeleteKey(hKeyRoot, sKey)
    If DeleteRegNodes = ERROR_SUCCESS Then Exit Function
    DeleteRegNodes = RegOpenKeyEx(hKeyRoot, sKey, 0, _
                                  KEY_ALL_ACCESS, hSubKey)
    ' Delete each subnode
    Do While DeleteRegNodes = ERROR_SUCCESS
        sKeyT = String$(cMaxPath, 0)
        DeleteRegNodes = RegEnumKeyEx(hSubKey, 0, sKeyT, cMaxPath, _
                                      pNull, sNullStr, 0, ft)
        sKeyT = MUtility.StrZToStr(sKeyT)
        ' Recursive call to remove node and any subnodes
        If DeleteRegNodes = ERROR_SUCCESS Then
            DeleteRegNodes = DeleteRegNodes(hSubKey, sKeyT)
        End If
    Loop
    Call RegCloseKey(hSubKey)
    ' Try to delete root again
    DeleteRegNodes = RegDeleteKey(hKeyRoot, sKey)

End Function

Function GetRegStr(sKey As String, sItem As String, _
                   Optional ByVal hRoot As EROOTKEY _
                       = HKEY_CURRENT_USER) As String
    Dim e As Long, hKey As Long, s As String
    ' Open a subkey
    e = RegOpenKeyEx(hRoot, sKey, 0, KEY_QUERY_VALUE, hKey)
    ApiRaiseIf e
    Dim ert As EREGTYPE, c As Long
    ' Get the length and make sure it's a string
    e = RegQueryValueEx(hKey, sItem, 0&, ert, 0&, c)
    ApiRaiseIf e
    BugAssert ert = REG_SZ
    If c <> 0 Then
        s = String$(c - 1, 0)
        ' Read the string
        e = RegQueryValueExStr(hKey, sItem, 0&, ert, s, c)
        ApiRaiseIf e
    End If
    RegCloseKey hKey
    GetRegStr = s
End Function

Function GetRegInt(sKey As String, sItem As String, _
                   Optional ByVal hRoot As EROOTKEY = HKEY_CURRENT_USER _
                   ) As Long
    Dim e As Long, hKey As Long
    ' Open a subkey
    e = RegOpenKeyEx(hRoot, sKey, 0, KEY_QUERY_VALUE, hKey)
    ApiRaiseIf e
    Dim ert As EREGTYPE, iVal As Long, c As Long
    ' Get the length and make sure it's an integer
    e = RegQueryValueEx(hKey, sItem, 0&, ert, 0&, c)
    ApiRaiseIf e
    BugAssert ert = REG_DWORD
    If c <> 0 Then
        ' Read the integer
        e = RegQueryValueExInt(hKey, sItem, 0&, ert, iVal, c)
        ApiRaiseIf e
    End If
    RegCloseKey hKey
    GetRegInt = iVal
End Function

' Get key locations in registry

Function GetDesktop() As String
    GetDesktop = GetRegStr(sWinExp, "Desktop") & sBack
End Function

Function GetFavorites() As String
    GetFavorites = GetRegStr(sWinExp, "Favorites") & sBack
End Function

Function GetStartMenu() As String
    GetStartMenu = GetRegStr(sWinExp, "Start Menu") & sBack
End Function

Function GetStartup() As String
    GetStartup = GetRegStr(sWinExp, "Startup") & sBack
End Function

Function GetPrograms() As String
    GetPrograms = GetRegStr(sWinExp, "Programs") & sBack
End Function

Function GetAppData() As String
    GetAppData = GetRegStr(sWinExp, "AppData") & sBack
End Function

Function GetCommonDesktop() As String
    GetCommonDesktop = GetRegStr(sWinExp, "Common Desktop") & sBack
End Function

Function GetCommonStartMenu() As String
    GetCommonStartMenu = GetRegStr(sWinExp, "Common Start Menu") & sBack
End Function

Function GetCommonStartup() As String
    GetCommonStartup = GetRegStr(sWinExp, "Common Startup") & sBack
End Function

Function GetCommonPrograms() As String
    GetCommonPrograms = GetRegStr(sWinExp, "Common Programs") & sBack
End Function

#If fComponent = 0 Then
Private Sub ErrRaise(e As Long)
    Dim sText As String, sSource As String
    If e > 1000 Then
        sSource = App.ExeName & ".RegTool"
        Select Case e
        Case eeBaseRegTool
            BugAssert True
       ' Case ee...
       '     Add additional errors
        End Select
        Err.Raise COMError(e), sSource, sText
    Else
        ' Raise standard Visual Basic error
        sSource = App.ExeName & ".VBError"
        Err.Raise e, sSource
    End If
End Sub
#End If