frmabout.frm

此文件为OPC client VBTend 源代码,在VB开发环境下调试运行

VERSION 5.00
Begin VB.Form frmAbout 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "About MyApp"
   ClientHeight    =   3564
   ClientLeft      =   2340
   ClientTop       =   1932
   ClientWidth     =   5736
   ClipControls    =   0   'False
   LinkTopic       =   "Form2"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   2453.724
   ScaleMode       =   0  'User
   ScaleWidth      =   5380.766
   ShowInTaskbar   =   0   'False
   Begin VB.PictureBox picIcon 
      AutoSize        =   -1  'True
      ClipControls    =   0   'False
      Height          =   432
      Left            =   240
      Picture         =   "frmAbout.frx":0000
      ScaleHeight     =   263.118
      ScaleMode       =   0  'User
      ScaleWidth      =   263.118
      TabIndex        =   1
      Top             =   240
      Width           =   432
   End
   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        =   2
      Top             =   3075
      Width           =   1245
   End
   Begin VB.Line Line1 
      BorderColor     =   &H00808080&
      BorderStyle     =   6  'Inside Solid
      Index           =   1
      X1              =   84.426
      X2              =   5309.473
      Y1              =   1687.452
      Y2              =   1687.452
   End
   Begin VB.Label lblDescription 
      Caption         =   "Trend application."
      ForeColor       =   &H00000000&
      Height          =   1170
      Left            =   1050
      TabIndex        =   3
      Top             =   1125
      Width           =   3885
   End
   Begin VB.Label lblTitle 
      Caption         =   "Visual Basic Trend"
      ForeColor       =   &H00000000&
      Height          =   480
      Left            =   1050
      TabIndex        =   5
      Top             =   240
      Width           =   3885
   End
   Begin VB.Line Line1 
      BorderColor     =   &H00FFFFFF&
      BorderWidth     =   2
      Index           =   0
      X1              =   98.497
      X2              =   5309.473
      Y1              =   1697.779
      Y2              =   1697.779
   End
   Begin VB.Label lblVersion 
      Caption         =   "Version 1.0"
      Height          =   225
      Left            =   1050
      TabIndex        =   6
      Top             =   780
      Width           =   3885
   End
   Begin VB.Label lblDisclaimer 
      Caption         =   "Copyright (Siemens Building Technologies, Inc., Landis Division ) 1998"
      ForeColor       =   &H00000000&
      Height          =   825
      Left            =   255
      TabIndex        =   4
      Top             =   2625
      Width           =   3870
   End
End
Attribute VB_Name = "frmAbout"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'///////////////////////////////////////////////////////////////////////////
'
'  OPC Trend VB Client: frmAbout.frm
'                       (Source File)
'
'///////////////////////////////////////////////////////////////////////////
'
'          Author: Raphael Imhof
'    Initial Date: 11/04/98
'       $Workfile: frmAbout.frm $
'       $Revision: 1 $
'           $Date: 7/27/99 5:13p $
'   Target System: Microsoft Windows NT 4.0
'     Environment: Visual Basic 6.0 / OPC DataAccess 2.0
'         Remarks:
'
'///////////////////////////////////////////////////////////////////////////
'
'     Description: implementation of the about box form.
'
'
'///////////////////////////////////////////////////////////////////////////
'
'  History of Changes     (Please remove very old comments and blank lines!)
'            $Log: /IDK/OPCServer/clients/VB/Trend/frmAbout.frm $
' 
' 1     7/27/99 5:13p Imhof
' 
' 1     7/27/99 4:37p Imhof
' 
' 3     1/20/99 3:09p Imhof
' Header: updated log
'
'
'  $Nokeywords:$ (To avoid useless search while checking in.)
'///////////////////////////////////////////////////////////////////////////
'  Copyright (C) 1999, Siemens Building Technologies, Inc. Landis Division
'
'  SIEMENS BUILDING TECHNOLOGIES, INC. IS PROVIDING THE FOLLOWING EXAMPLES
'  OF CODE AS SAMPLE ONLY.
'  SIEMENS BUILDING TECHNOLOGIES, INC. MAKES NO REPRESENTATIONS OR WARRANTIES
'  OF ANY KIND WITH RESPECT TO THE VALIDTY OF THE CODES OR DESIRED RESULTS
'  AND DISCLAIMS ALL SUCH REPRESENTATIONS AND WARRANTIES, INCLUDING FOR EXAMPLE,
'  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
'  SIEMENS BUILIDNG TECHNOLOGIES, INC. DOES NOT REPRESENT OR WARRANT THAT
'  THE FOLLOWING CODE SAMPLES ARE ACCURATE, VALID, COMPLETE OR CURRENT.
'
'///////////////////////////////////////////////////////////////////////////

Option Explicit

' 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


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
End Sub

Public Sub StartSysInfo()
    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) 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

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 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