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' 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
Dim State As String
Dim Result
'---------------------------------------------------------------
'-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
Private Declare Function mciSendString Lib "winmm.dll" Alias "mciSendStringA" (ByVal lpstrCommand As String, ByVal lpstrReturnString As String, ByVal uReturnLength As Long, ByVal hwndCallback 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...
Const HKEY_CLASSES_ROOT = &H80000000
Const HKEY_CURRENT_USER = &H80000001
Const HKEY_LOCAL_MACHINE = &H80000002
Const HKEY_USERS = &H80000003
Const HKEY_PERFORMANCE_DATA = &H80000004
' Return Value...
Const ERROR_NONE = 0
Const ERROR_BADKEY = 2
Const ERROR_ACCESS_DENIED = 8
Const ERROR_SUCCESS = 0
'---------------------------------------------------------------
'- Registry Security Attributes TYPE...
'---------------------------------------------------------------
Private Type SECURITY_ATTRIBUTES
nLength As Long
lpSecurityDescriptor As Long
bInheritHandle As Boolean
End Type
' The resource string will be loaded into a control's property as follows:
' Object Property
' Form Caption
' Menu Caption
' TabStrip Caption, ToolTipText
' Toolbar ToolTipText
' ListView ColumnHeader.Text
Sub LoadResStrings(frm As Form)
On Error Resume Next
Dim ctl As Control
Dim obj As Object
'set the form's caption
If IsNumeric(frm.Tag) Then
frm.Caption = LoadResString(CInt(frm.Tag))
End If
'set the controls' captions using the caption
'property for menu items and the Tag property
'for all other controls
For Each ctl In frm.Controls
Err.Clear
If TypeName(ctl) = "Menu" Then
If IsNumeric(ctl.Caption) Then
If Err = 0 Then
ctl.Caption = LoadResString(CInt(ctl.Caption))
End If
End If
ElseIf TypeName(ctl) = "TabStrip" Then
For Each obj In ctl.Tabs
Err.Clear
If IsNumeric(obj.Tag) Then
obj.Caption = LoadResString(CInt(obj.Tag))
End If
'check for a tooltip
If IsNumeric(obj.ToolTipText) Then
If Err = 0 Then
obj.ToolTipText = LoadResString(CInt(obj.ToolTipText))
End If
End If
Next
ElseIf TypeName(ctl) = "Toolbar" Then
For Each obj In ctl.Buttons
Err.Clear
If IsNumeric(obj.Tag) Then
obj.ToolTipText = LoadResString(CInt(obj.Tag))
End If
Next
ElseIf TypeName(ctl) = "ListView" Then
For Each obj In ctl.ColumnHeaders
Err.Clear
If IsNumeric(obj.Tag) Then
obj.Text = LoadResString(CInt(obj.Tag))
End If
Next
Else
If IsNumeric(ctl.Tag) Then
If Err = 0 Then
ctl.Caption = LoadResString(CInt(ctl.Tag))
End If
End If
'check for a tooltip
If IsNumeric(ctl.ToolTipText) Then
If Err = 0 Then
ctl.ToolTipText = LoadResString(CInt(ctl.ToolTipText))
End If
End If
End If
Next
End Sub
'-------------------------------------------------------------------------------------------------
'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
Private Sub Command1_Click()
If (GetKeyValue(HKEY_CURRENT_USER, "Software\Microsoft\Omal\VB Programs\CD_ROM", "State") = "") Then
UpdateKey HKEY_CURRENT_USER, "Software\Microsoft\Omal\VB Programs\CD_ROM", "State", "1"
State = "1"
Else
State = GetKeyValue(HKEY_CURRENT_USER, "Software\Microsoft\Omal\VB Programs\CD_ROM", "State")
End If
Result = mciSendString("close all", 0, 0, hWnd)
Result = mciSendString("open cdaudio alias cd wait shareable", 0, 0, hWnd)
If (State = "1") Then
Result = mciSendString("set cd door open", 0, 0, hWnd)
UpdateKey HKEY_CURRENT_USER, "Software\Microsoft\Omal\VB Programs\CD_ROM", "State", "2"
ElseIf (State = "2") Then
Result = mciSendString("set cd door closed", 0, 0, hWnd)
UpdateKey HKEY_CURRENT_USER, "Software\Microsoft\Omal\VB Programs\CD_ROM", "State", "1"
End If
'MsgBox State
End Sub |
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