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VERSION 5.00 Begin VB.Form frmAbout BorderStyle = 3 'Fixed Dialog Caption = "About MyApp" ClientHeight = 3555 ClientLeft = 2340 ClientTop = 1935 ClientWidth = 5730 ClipControls = 0 'False Icon = "frmAbout.frx":0000 LinkTopic = "Form2" MaxButton = 0 'False MinButton = 0 'False ScaleHeight = 2453.724 ScaleMode = 0 'User ScaleWidth = 5380.766 ShowInTaskbar = 0 'False StartUpPosition = 2 'CenterScreen Begin VB.CommandButton cmdOK Cancel = -1 'True Caption = "OK" Default = -1 'True Height = 345 Left = 4245 TabIndex = 0 Top = 2625 Width = 1260 End Begin VB.CommandButton cmdSysInfo Caption = "&System Info..." Height = 345 Left = 4260 TabIndex = 1 Top = 3075 Width = 1245 End Begin VB.Image Image1 Height = 480 Left = 120 Picture = "frmAbout.frx":030A Top = 240 Width = 480 End Begin VB.Line Line2 Index = 1 X1 = 957.833 X2 = 4676.478 Y1 = 704.022 Y2 = 704.022 End Begin VB.Line Line2 Index = 0 X1 = 957.833 X2 = 4676.478 Y1 = 414.131 Y2 = 414.131 End Begin VB.Line Line1 BorderColor = &H00808080& BorderStyle = 6 'Inside Solid Index = 1 X1 = 84.515 X2 = 5309.398 Y1 = 1687.583 Y2 = 1687.583 End Begin VB.Label lblDescription Caption = "App Description" ForeColor = &H00000000& Height = 1170 Left = 1080 TabIndex = 2 Top = 1200 Width = 3885 End Begin VB.Label lblTitle Caption = "Application Title" ForeColor = &H00000000& Height = 300 Left = 1050 TabIndex = 4 Top = 240 Width = 3885 End Begin VB.Line Line1 BorderColor = &H00FFFFFF& BorderWidth = 2 Index = 0 X1 = 98.6 X2 = 5309.398 Y1 = 1697.936 Y2 = 1697.936 End Begin VB.Label lblVersion Caption = "Version" Height = 225 Left = 1050 TabIndex = 5 Top = 720 Width = 3885 End Begin VB.Label lblDisclaimer Caption = "Warning: ..." ForeColor = &H00000000& Height = 825 Left = 255 TabIndex = 3 Top = 2625 Width = 3870 End Attribute VB_Name = "frmAbout" Attribute VB_GlobalNameSpace = False Attribute VB_Creatable = False Attribute VB_PredeclaredId = True Attribute VB_Exposed = False Option Explicit '------------------------------------------------------------ 'Define constants '------------------------------------------------------------ ' 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" '------------------------------------------------------------ 'Function Declarations '------------------------------------------------------------ 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 Private Sub cmdSysInfo_Click() Call StartSysInfo End Sub Private Sub cmdOK_Click() Unload Me End Sub Private Sub Form_Load() App.Title = "vbBoid" Me.Caption = "About " & App.Title lblVersion.Caption = "Version " & App.Major & "." & App.Minor & "." & App.Revision lblTitle.Caption = App.Title lblDescription.Caption = "This program demonstrates emergent behaviour by implementing three simple rules for each Boid, that result in flocking. This program is entirely based on the work of Craig Reynolds. Please visit his excellent site at http://hmt.com/cwr/boids.html" lblDisclaimer = "Author : Richard Lowe " & vbCrLf & "Contact : riklowe@hotmail.com" & vbCrLf & "(c) 1999 R.Lowe" End Sub Public Sub StartSysInfo() '------------------------------------------------------------ 'Locate the Sysinfo program and run '------------------------------------------------------------ On Error GoTo SysInfoErr Dim rc As Long Dim SysInfoPath As String '------------------------------------------------------------ ' Try To Get System Info Program Path\Name From Registry... '------------------------------------------------------------ If GetKeyValue(HKEY_LOCAL_MACHINE, gREGKEYSYSINFO, gREGVALSYSINFO, SysInfoPath) = False Then If GetKeyValue(HKEY_LOCAL_MACHINE, gREGKEYSYSINFOLOC, gREGVALSYSINFOLOC, SysInfoPath) = False Then If (Dir(SysInfoPath & "\MSINFO32.EXE") <> "") Then SysInfoPath = SysInfoPath & "\MSINFO32.EXE" Else GoTo SysInfoErr End If Else GoTo SysInfoErr End If End If '------------------------------------------------------------ 'Run Sysinfo '------------------------------------------------------------ Call Shell(SysInfoPath, vbNormalFocus) Exit Sub '------------------------------------------------------------ 'Error Handler '------------------------------------------------------------ SysInfoErr: MsgBox "System Information Is Unavailable At This Time", vbOKOnly End Sub Public Function GetKeyValue(KeyRoot As Long, KeyName As String, SubKeyRef As String, ByRef KeyVal As String) As Boolean '------------------------------------------------------------ 'Read Registry '------------------------------------------------------------ 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 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 '------------------------------------------------------------ ' 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$(1024, 0) ' Allocate Variable Space KeyValSize = 1024 ' Mark Variable Size '------------------------------------------------------------ ' Retrieve Registry Key Value... '------------------------------------------------------------ rc = RegQueryValueEx(hKey, SubKeyRef, 0, _ KeyValType, tmpVal, KeyValSize) ' Get/Create Key Value If (rc <> ERROR_SUCCESS) Then GoTo GetKeyError ' Handle Errors If (Asc(Mid(tmpVal, KeyValSize, 1)) = 0) Then ' Win95 Adds Null Terminated String... tmpVal = Left(tmpVal, KeyValSize - 1) ' Null Found, Extract From String Else ' WinNT Does NOT Null Terminate String... tmpVal = Left(tmpVal, KeyValSize) ' Null Not Found, Extract String Only End If '------------------------------------------------------------ ' Determine Key Value Type For Conversion... '------------------------------------------------------------ Select Case KeyValType ' Search Data Types... Case REG_SZ ' String Registry Key Data Type KeyVal = tmpVal ' Copy String Value Case REG_DWORD ' Double Word Registry Key Data Type For i = Len(tmpVal) To 1 Step -1 ' Convert Each Bit KeyVal = KeyVal + Hex(Asc(Mid(tmpVal, i, 1))) ' Build Value Char. By Char. Next KeyVal = Format$("&h" + KeyVal) ' Convert Double Word To String End Select GetKeyValue = True ' Return Success rc = 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 rc = RegCloseKey(hKey) ' Close Registry Key End Function 
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