by Jamesborn2code (2 Submissions)
Category: Custom Controls/Forms/Menus
Compatability: VB 6.0
Difficulty: Unknown Difficulty
Originally Published: Wed 20th June 2007
Date Added: Mon 8th February 2021
Rating: 
(1 Votes)
Gives information about the system that is being developed
API Declarations
' 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_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_LOCAL_MACHINE = &H80000002
Const ERROR_SUCCESS = 0
Const REG_SZ = 1 ' Unicode nul terminated string
Const REG_DWORD = 4 ' 32-bit number
Const gREGKEYSYSINFOLOC = "SOFTWARE\Microsoft\Shared Tools Location"
Const gREGVALSYSINFOLOC = "MSINFO"
Const gREGKEYSYSINFO = "SOFTWARE\Microsoft\Shared Tools\MSINFO"
Const gREGVALSYSINFO = "PATH"
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 RegCloseKey Lib "advapi32" (ByVal hKey As Long) As Long
Public Function GetKeyValue(KeyRoot As Long, KeyName As String, SubKeyRef As String, ByRef KeyVal As String) As Boolean
Dim i As Long ' Loop Counter
Dim SJ As Long ' Return Code
Dim hKey As Long ' Handle To An Open Registry Key
Dim hDepth As Long '
Dim KeyValType 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
VBcoders
Private Sub cmdSysInfo_Click()
Call StartSysInfo
End Sub
Private Sub cmdOK_Click()
Unload Me
End Sub
Private Sub Form_Load()
Me.Caption = "About " & App.Title
lblVersion.Caption = "Version " & App.Major & "." & App.Minor & "." & App.Revision
lblTitle.Caption = App.Title
lblDescription.Caption = " JAMESBORN2CODE IT-10001" & vbCrLf & " "
End Sub
Public Sub StartSysInfo()
On Error GoTo SysInfoErr
Dim SJ As Long
Dim SysInfoPath As String
' Try To Get System Info Program Path\Name From Registry...
If GetKeyValue(HKEY_LOCAL_MACHINE, gREGKEYSYSINFO, gREGVALSYSINFO, SysInfoPath) Then
' Try To Get System Info Program Path Only From Registry...
ElseIf GetKeyValue(HKEY_LOCAL_MACHINE, gREGKEYSYSINFOLOC, gREGVALSYSINFOLOC, SysInfoPath) Then
' Validate Existance Of Known 32 Bit File Version
If (Dir(SysInfoPath & "\MSINFO32.EXE") <> "") Then
SysInfoPath = SysInfoPath & "\MSINFO32.EXE"
' Error - File Can Not Be Found...
Else
GoTo SysInfoErr
End If
' Error - Registry Entry Can Not Be Found...
Else
GoTo SysInfoErr
End If
Call Shell(SysInfoPath, vbNormalFocus)
Exit Sub
SysInfoErr:
MsgBox "System Information Is Unavailable At This Time", vbOKOnly
End Sub
'------------------------------------------------------------
' Open RegKey Under KeyRoot {HKEY_LOCAL_MACHINE...}
'------------------------------------------------------------
SJ = RegOpenKeyEx(KeyRoot, KeyName, 0, KEY_ALL_ACCESS, hKey) ' Open Registry Key
If (SJ <> ERROR_SUCCESS) Then GoTo GetKeyError ' Handle Error...
tmpVal = String$(1024, 0) ' Allocate Variable Space
KeyValSize = 1024 ' Mark Variable Size
'------------------------------------------------------------
' Retrieve Registry Key Value...
'------------------------------------------------------------
SJ = RegQueryValueEx(hKey, SubKeyRef, 0, _
KeyValType, tmpVal, KeyValSize) ' Get/Create Key Value
If (SJ <> ERROR_SUCCESS) Then GoTo GetKeyError ' Handle Errors
If (Asc(Mid$(tmpVal, KeyValSize, 1)) = 0) Then ' Win95 Adds Null Terminated String...
tmpVal = Left$(tmpVal, KeyValSize - 1) ' Null Found, Extract From String
Else ' WinNT Does NOT Null Terminate String...
tmpVal = Left$(tmpVal, KeyValSize) ' Null Not Found, Extract String Only
End If
'------------------------------------------------------------
' Determine Key Value Type For Conversion...
'------------------------------------------------------------
Select Case KeyValType ' SeaSJh Data Types...
Case REG_SZ ' String Registry Key Data Type
KeyVal = tmpVal ' Copy String Value
Case REG_DWORD ' Double Word Registry Key Data Type
For i = Len(tmpVal) To 1 Step -1 ' Convert Each Bit
KeyVal = KeyVal + Hex$(Asc(Mid(tmpVal, i, 1))) ' Build Value Char. By Char.
Next
KeyVal = Format$("&h" + KeyVal) ' Convert Double Word To String
End Select
GetKeyValue = True ' Return Success
SJ = RegCloseKey(hKey) ' Close Registry Key
Exit Function ' Exit
GetKeyError: ' Cleanup After An Error Has Occured...
KeyVal = "" ' Set Return Val To Empty String
GetKeyValue = False ' Return Failure
SJ = RegCloseKey(hKey) ' Close Registry Key
End Function