VERSION 5.00
Begin VB.Form frmAbout 
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "關于我的應用程序"
   ClientHeight    =   3555
   ClientLeft      =   2340
   ClientTop       =   1935
   ClientWidth     =   5730
   ClipControls    =   0   'False
   LinkTopic       =   "Form2"
   LockControls    =   -1  'True
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   2453.724
   ScaleMode       =   0  'User
   ScaleWidth      =   5380.766
   ShowInTaskbar   =   0   'False
   Begin VB.PictureBox picIcon 
      Appearance      =   0  'Flat
      AutoSize        =   -1  'True
      BackColor       =   &H80000005&
      BorderStyle     =   0  'None
      ClipControls    =   0   'False
      ForeColor       =   &H80000008&
      Height          =   720
      Left            =   0
      Picture         =   "frmAbout.frx":0000
      ScaleHeight     =   505.68
      ScaleMode       =   0  'User
      ScaleWidth      =   505.68
      TabIndex        =   1
      Top             =   0
      Width           =   720
   End
   Begin VB.CommandButton cmdOK 
      Cancel          =   -1  'True
      Caption         =   "確定"
      Default         =   -1  'True
      Height          =   345
      Left            =   4125
      TabIndex        =   0
      Top             =   2625
      Width           =   1500
   End
   Begin VB.CommandButton cmdSysInfo 
      Caption         =   "系統信息(&S)..."
      Height          =   345
      Left            =   4140
      TabIndex        =   2
      Top             =   3075
      Width           =   1485
   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 
      BackStyle       =   0  'Transparent
      Caption         =   $"frmAbout.frx":628A
      ForeColor       =   &H00000000&
      Height          =   1170
      Left            =   720
      TabIndex        =   3
      Top             =   960
      Width           =   4725
   End
   Begin VB.Label lblTitle 
      Alignment       =   2  'Center
      BackStyle       =   0  'Transparent
      Caption         =   "    "
      BeginProperty Font 
         Name            =   "宋體"
         Size            =   10.5
         Charset         =   134
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00000000&
      Height          =   480
      Left            =   1920
      TabIndex        =   5
      Top             =   240
      Width           =   2085
   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         =   "正式版V1.0"
      Height          =   225
      Left            =   720
      TabIndex        =   6
      Top             =   600
      Width           =   3885
   End
   Begin VB.Label lblDisclaimer 
      Caption         =   "軟件類型：共享。歡迎大家交流指正，使用本系統，本人保留最終解釋權！"
      ForeColor       =   &H00000000&
      Height          =   825
      Left            =   255
      TabIndex        =   4
      Top             =   2625
      Width           =   3630
   End
End
Attribute VB_Name = "frmAbout"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

' 注冊表關鍵字安全選項...
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
                     
' 注冊表關鍵字 ROOT 類型...
Const HKEY_LOCAL_MACHINE = &H80000002
Const ERROR_SUCCESS = 0
Const REG_SZ = 1                         ' 獨立的空的終結字符串
Const REG_DWORD = 4                      ' 32位數字

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 = "關于 " & Trim("我的應用程序")
    lblVersion.Caption = "版本 " & App.Major & "." & App.Minor & "." & App.Revision
    lblTitle.Caption = "圖書信息管理系統"
End Sub
Public Sub StartSysInfo()
    On Error GoTo SysInfoErr
    Dim rc As Long
    Dim SysInfoPath As String
                                      ' 從注冊表中獲得系統信息程序的路徑及名稱...
    If GetKeyValue(HKEY_LOCAL_MACHINE, gREGKEYSYSINFO, gREGVALSYSINFO, SysInfoPath) Then
                                   ' 從注冊表中獲得系統信息程序的路徑...
     ElseIf GetKeyValue(HKEY_LOCAL_MACHINE, gREGKEYSYSINFOLOC, gREGVALSYSINFOLOC, SysInfoPath) Then
                                  ' 已知32位文件版本的有效位置
        If (Dir(SysInfoPath & "\MSINFO32.EXE") <> "") Then
            SysInfoPath = SysInfoPath & "\MSINFO32.EXE"
                            ' 發生錯誤 - 文件不能被找到...
        Else
            GoTo SysInfoErr
        End If
                           ' 發生錯誤 - 注冊表相應條目不能被找到...
    Else
        GoTo SysInfoErr
      End If
    Call Shell(SysInfoPath, vbNormalFocus)
    Exit Sub
SysInfoErr:
    MsgBox "抱歉！系統信息不可用", 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                                           ' 循環計數器
    Dim rc As Long                                          ' 返回代碼
    Dim hKey As Long                                        ' 打開的注冊表關鍵字句柄
    Dim hDepth As Long                                      '
    Dim KeyValType As Long                                  ' 注冊表關鍵字數據類型
    Dim tmpVal As String                                    ' 注冊表關鍵字值的臨時存儲器
    Dim KeyValSize As Long                                  ' 注冊表關鍵自變量的尺寸
    '------------------------------------------------------------
    ' 打開 {HKEY_LOCAL_MACHINE...} 下的 RegKey
    '------------------------------------------------------------
    rc = RegOpenKeyEx(KeyRoot, KeyName, 0, KEY_ALL_ACCESS, hKey) ' 打開注冊表關鍵字
    
    If (rc <> ERROR_SUCCESS) Then GoTo GetKeyError          ' 處理錯誤...
    
    tmpVal = String$(1024, 0)                             ' 分配變量空間
    KeyValSize = 1024                                       ' 標記變量尺寸
    
    '------------------------------------------------------------
    ' 檢索注冊表關鍵字的值...
    '------------------------------------------------------------
    rc = RegQueryValueEx(hKey, SubKeyRef, 0, _
                         KeyValType, tmpVal, KeyValSize)    ' 獲得/創建關鍵字值
                        
    If (rc <> ERROR_SUCCESS) Then GoTo GetKeyError          ' 處理錯誤
    
    If (Asc(Mid(tmpVal, KeyValSize, 1)) = 0) Then           ' Win95 外接程序空終結字符串...
        tmpVal = Left(tmpVal, KeyValSize - 1)               ' Null 被找到,從字符串中分離出來
    Else                                                    ' WinNT 沒有空終結字符串...
        tmpVal = Left(tmpVal, KeyValSize)                   ' Null 沒有被找到, 分離字符串
    End If
    '------------------------------------------------------------
    ' 決定轉換的關鍵字的值類型...
    '------------------------------------------------------------
    Select Case KeyValType                                  ' 搜索數據類型...
    Case REG_SZ                                             ' 字符串注冊關鍵字數據類型
        KeyVal = tmpVal                                     ' 復制字符串的值
    Case REG_DWORD                                          ' 四字節的注冊表關鍵字數據類型
        For i = Len(tmpVal) To 1 Step -1                    ' 將每位進行轉換
            KeyVal = KeyVal + Hex(Asc(Mid(tmpVal, i, 1)))   ' 生成值字符。 By Char。
        Next
        KeyVal = Format$("&h" + KeyVal)                     ' 轉換四字節的字符為字符串
    End Select
    
    GetKeyValue = True                                      ' 返回成功
    rc = RegCloseKey(hKey)                                  ' 關閉注冊表關鍵字
    Exit Function                                           ' 退出
    
GetKeyError:      ' 錯誤發生后將其清除...
    KeyVal = ""                                             ' 設置返回值到空字符串
    GetKeyValue = False                                     ' 返回失敗
    rc = RegCloseKey(hKey)                                  ' 關閉注冊表關鍵字
End Function