by Cyrus Lacaba aka Biohazard of Las Pi?as (6 Submissions)
Category: Windows API Call/Explanation
Compatability: VB.NET
Difficulty: Unknown Difficulty
Originally Published: Fri 17th July 2009
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
'Registry Manipulation 'Enable/Disable RegEdit 'Set Application Limit 'Granting of License (criteria based on you) 'Autorun Program, etc.
VBcoders
Private Sub Command1_Click()
Dim cls_reg As New clsReg
With cls_reg
cls_reg.AppName = Trim(Text2)
MsgBox .WillRunAtStartup
End With
End Sub
Private Sub Command2_Click()
Dim cls_reg As New clsReg
With cls_reg
.AppName = Trim(Text2)
.RunAtStartUp = False
.SetRunAtStartup
End With
End Sub
Private Sub Command3_Click()
Dim cls_reg As New clsReg, intnu%
'License Granted
cls_reg.ShareWareLimit 2, Trim(Text2)
End Sub
Private Sub Command4_Click()
Dim cls_reg As New clsReg
With cls_reg
.AppName = Trim(Text2)
.AppPath = Trim(Text3)
.RunAtStartUp = True
.SetRunAtStartup
End With
End Sub
Private Sub Command5_Click()
Dim cls_reg As New clsReg, intnu%
'Set Shareware Limit
cls_reg.ShareWareLimit 1, Trim(Text2), Val(Text1), intnu%
'Application #2 should verify the Limit
End Sub
Private Sub Command6_Click()
Static i%
Dim cls_reg As New clsReg
If i% = 0 Then
cls_reg.DisableRegEdit True
i% = 1
Else
cls_reg.DisableRegEdit False
i% = 0
End If
End Sub
'-------------------------clsReg
Private Const READ_CONTROL = &H20000
Private Const KEY_SET_VALUE = &H2
Private Const KEY_CREATE_SUB_KEY = &H4
Private Const STANDARD_RIGHTS_WRITE = (READ_CONTROL)
Private Const SYNCHRONIZE = &H100000
Private Const KEY_WRITE = ((STANDARD_RIGHTS_WRITE Or KEY_SET_VALUE Or KEY_CREATE_SUB_KEY) And (Not SYNCHRONIZE))
Private Const STANDARD_RIGHTS_READ = (READ_CONTROL)
Private Const KEY_ENUMERATE_SUB_KEYS = &H8
Private Const KEY_NOTIFY = &H10
Private Const KEY_QUERY_VALUE = &H1
Private Const KEY_READ = ((STANDARD_RIGHTS_READ Or KEY_QUERY_VALUE Or KEY_ENUMERATE_SUB_KEYS Or KEY_NOTIFY) And (Not SYNCHRONIZE))
Private Const ERROR_SUCCESS = 0&
Private Const HKEY_CURRENT_USER = &H80000001
Private Const REG_SZ = 1
Private Declare Function RegCreateKeyEx Lib "advapi32.dll" 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, ByVal lpSecurityAttributes As Long, phkResult As Long, lpdwDisposition As Long) As Long
Private 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 ' Note that if you declare the lpData parameter as String, you must pass it By Value.
Private Declare Function RegDeleteValue Lib "advapi32.dll" Alias "RegDeleteValueA" (ByVal hKey As Long, ByVal lpValueName As String) As Long
Private Declare Function RegCloseKey Lib "advapi32.dll" (ByVal hKey As Long) As Long
Private 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
Private 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 ' Note that if you declare the lpData parameter as String, you must pass it By Value.
'-------------------------
Private app_name As String, _
app_path As String, _
rn_startup As Boolean, _
errnum As Long
Public Property Let AppName(strValue As String)
app_name = strValue
End Property
Public Property Get AppName() As String
AppName = app_name
End Property
Public Property Let AppPath(strValue$)
app_path = strValue$
End Property
Public Property Get AppPath() As String
AppPath = app_path
End Property
Public Property Get RunAtStartUp() As Boolean
RunAtStartUp = rn_startup
End Property
Public Property Let RunAtStartUp(blnValue As Boolean)
rn_startup = blnValue
End Property
Public Property Get ErrCode() As Long
ErrCode = errnum
End Property
Public Sub SetRunAtStartup()
Dim hKey As Long
Dim key_value As String
Dim status As Long
On Error GoTo SetStartupError
If RegCreateKeyEx(HKEY_CURRENT_USER, _
"Software\Microsoft\Windows\CurrentVersion\Run", _
ByVal 0&, ByVal 0&, ByVal 0&, _
KEY_WRITE, ByVal 0&, hKey, _
ByVal 0&) <> ERROR_SUCCESS Then
errnum = Err.Number
End If
If RunAtStartUp Then
key_value = AppPath & "\" & AppName & ".exe" & vbNullChar
status = RegSetValueEx(hKey, AppName, 0, REG_SZ, ByVal key_value, Len(key_value))
If status <> ERROR_SUCCESS Then
errnum = Err.Number
End If
Else
RegDeleteValue hKey, AppName
End If
RegCloseKey hKey
Exit Sub
SetStartupError:
errnum = Err.Number
End Sub
Public Function WillRunAtStartup() As Boolean
Dim hKey As Long
Dim value_type As Long
If RegOpenKeyEx(HKEY_CURRENT_USER, _
"Software\Microsoft\Windows\CurrentVersion\Run", _
0, KEY_READ, hKey) = ERROR_SUCCESS Then
WillRunAtStartup = (RegQueryValueEx(hKey, AppName, ByVal 0&, value_type, ByVal 0&, ByVal 0&) = ERROR_SUCCESS)
RegCloseKey hKey
Else
WillRunAtStartup = False
End If
End Function
Public Sub DisableRegEdit(blnValue As Boolean)
On Error Resume Next
Dim wsobj As Object, strKey$
Set wsobj = CreateObject("wscript.shell")
strKey$ = "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools"
If blnValue Then
wsobj.regwrite strKey$, 1, "REG_DWORD"
Else
wsobj.regdelete strKey$
End If
Set wsobj = Nothing
End Sub
Public Function ShareWareLimit(lngOperation As Long, strAppName As String, Optional intDaysLimit% = 0, Optional ByRef intDaysUsed% = 0) As Long
On Error Resume Next
'KEY_CURRENT_USER\Software\VB and VBA Program
Select Case lngOperation
Case 1 'Set Shareware Limit
SaveSetting strAppName, "Startup", "Counter", 1
SaveSetting strAppName, "Startup", "Limit", intDaysLimit%
SaveSetting strAppName, "Startup", "Started", Format(Date, "mm dd yyyy")
SaveSetting strAppName, "Startup", "Last Used", Format(Date, "mm dd yyyy")
DeleteSetting strAppName, "Startup", "License"
intDaysUsed% = 1
'Set
ShareWareLimit = -1
Case 2 'Licensed to Use
SaveSetting strAppName, "Startup", "License", "1"
DeleteSetting strAppName, "Startup", "Counter"
DeleteSetting strAppName, "Startup", "Limit"
DeleteSetting strAppName, "Startup", "Started"
DeleteSetting strAppName, "Startup", "Last Used"
ShareWareLimit = 4
End Select
End Function
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