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📄 frmabout.frm

📁 小小图书管理系统是功能完善,已经可以实用于小型单位或科室的图书管理.系统界面美观,操作方便,代码带有详尽的注释,相信大家一定会喜欢
💻 FRM
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VERSION 5.00
Begin VB.Form frmAbout 
   Appearance      =   0  'Flat
   AutoRedraw      =   -1  'True
   BackColor       =   &H80000005&
   BorderStyle     =   0  'None
   Caption         =   "关于软件"
   ClientHeight    =   3900
   ClientLeft      =   3480
   ClientTop       =   3450
   ClientWidth     =   7965
   ClipControls    =   0   'False
   LinkTopic       =   "Form2"
   MaxButton       =   0   'False
   MinButton       =   0   'False
   ScaleHeight     =   260
   ScaleMode       =   3  'Pixel
   ScaleWidth      =   531
   ShowInTaskbar   =   0   'False
   Begin Project1.xp_canvas xp_canvas1 
      Height          =   3855
      Left            =   0
      TabIndex        =   0
      Top             =   0
      Width           =   7935
      _ExtentX        =   13996
      _ExtentY        =   6800
      Caption         =   "关于软件"
      Icon            =   "frmAbout.frx":0000
      Begin Project1.xpcmdbutton cmdSysInfo 
         Height          =   495
         Left            =   1800
         TabIndex        =   9
         Top             =   2880
         Width           =   1455
         _ExtentX        =   2566
         _ExtentY        =   873
         Caption         =   "系统信息(&S)..."
         BeginProperty Font {0BE35203-8F91-11CE-9DE3-00AA004BB851} 
            Name            =   "宋体"
            Size            =   9
            Charset         =   134
            Weight          =   400
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
      End
      Begin Project1.xpcmdbutton cmdOK 
         Height          =   495
         Left            =   360
         TabIndex        =   8
         Top             =   2880
         Width           =   1335
         _ExtentX        =   2355
         _ExtentY        =   873
         Caption         =   "确定"
         BeginProperty Font {0BE35203-8F91-11CE-9DE3-00AA004BB851} 
            Name            =   "宋体"
            Size            =   9
            Charset         =   134
            Weight          =   400
            Underline       =   0   'False
            Italic          =   0   'False
            Strikethrough   =   0   'False
         EndProperty
      End
      Begin VB.Frame Frame2 
         Height          =   1575
         Left            =   240
         TabIndex        =   6
         Top             =   1200
         Width           =   3375
         Begin VB.Label lblDisclaimer 
            Caption         =   "警告:                      本计算机程序受版权法和国际条约的保护,未经许可,不得擅自复制或传播(或其中任何部分),违者必究!"
            BeginProperty Font 
               Name            =   "新宋体"
               Size            =   12
               Charset         =   134
               Weight          =   400
               Underline       =   0   'False
               Italic          =   0   'False
               Strikethrough   =   0   'False
            EndProperty
            Height          =   1455
            Left            =   120
            TabIndex        =   7
            Top             =   0
            Width           =   3135
         End
      End
      Begin VB.Frame Frame1 
         Height          =   3135
         Left            =   3720
         TabIndex        =   2
         Top             =   480
         Width           =   3975
         Begin VB.Label lblDescription 
            Caption         =   $"frmAbout.frx":57F2
            BeginProperty Font 
               Name            =   "新宋体"
               Size            =   12
               Charset         =   134
               Weight          =   400
               Underline       =   0   'False
               Italic          =   0   'False
               Strikethrough   =   0   'False
            EndProperty
            Height          =   1335
            Left            =   120
            TabIndex        =   5
            Top             =   1680
            Width           =   3735
         End
         Begin VB.Label lblVersion 
            Caption         =   "版 本"
            BeginProperty Font 
               Name            =   "新宋体"
               Size            =   12
               Charset         =   134
               Weight          =   400
               Underline       =   0   'False
               Italic          =   0   'False
               Strikethrough   =   0   'False
            EndProperty
            Height          =   615
            Left            =   120
            TabIndex        =   4
            Top             =   960
            Width           =   3615
         End
         Begin VB.Label lblTitle 
            Caption         =   "应用程序标题"
            BeginProperty Font 
               Name            =   "新宋体"
               Size            =   12
               Charset         =   134
               Weight          =   400
               Underline       =   0   'False
               Italic          =   0   'False
               Strikethrough   =   0   'False
            EndProperty
            Height          =   495
            Left            =   120
            TabIndex        =   3
            Top             =   240
            Width           =   3615
         End
      End
      Begin VB.PictureBox Picture1 
         Height          =   615
         Left            =   240
         Picture         =   "frmAbout.frx":5890
         ScaleHeight     =   555
         ScaleWidth      =   3315
         TabIndex        =   1
         Top             =   480
         Width           =   3375
      End
      Begin Project1.xptopbuttons xptopbuttons1 
         Height          =   315
         Left            =   7560
         Top             =   0
         Width           =   315
         _ExtentX        =   556
         _ExtentY        =   556
      End
   End
End
Attribute VB_Name = "frmAbout"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

' 注册表关键字安全选项...
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
                     
' 注册表关键字 ROOT 类型...
Const HKEY_LOCAL_MACHINE = &H80000002
Const ERROR_SUCCESS = 0
Const REG_SZ = 1                         ' 独立的空的终结字符串
Const REG_DWORD = 4                      ' 32位数字

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 = "关于 " & App.Title
    lblVersion.Caption = "版本 " & 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
    
    ' 试图从注册表中获得系统信息程序的路径及名称...
    If GetKeyValue(HKEY_LOCAL_MACHINE, gREGKEYSYSINFO, gREGVALSYSINFO, SysInfoPath) Then
    ' 试图仅从注册表中获得系统信息程序的路径...
    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"
            
        ' 错误 - 文件不能被找到...
        Else
            GoTo SysInfoErr
        End If
    ' 错误 - 注册表相应条目不能被找到...
    Else
        GoTo SysInfoErr
    End If
    
    Call Shell(SysInfoPath, vbNormalFocus)
    
    Exit Sub
SysInfoErr:
    Msgbox "此时系统信息不可用", 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                                           ' 循环计数器
    Dim rc As Long                                          ' 返回代码
    Dim hKey As Long                                        ' 打开的注册表关键字句柄
    Dim hDepth As Long                                      '
    Dim KeyValType As Long                                  ' 注册表关键字数据类型
    Dim tmpVal As String                                    ' 注册表关键字值的临时存储器
    Dim KeyValSize As Long                                  ' 注册表关键自变量的尺寸
    '------------------------------------------------------------
    ' 打开 {HKEY_LOCAL_MACHINE...} 下的 RegKey
    '------------------------------------------------------------
    rc = RegOpenKeyEx(KeyRoot, KeyName, 0, KEY_ALL_ACCESS, hKey) ' 打开注册表关键字
    
    If (rc <> ERROR_SUCCESS) Then GoTo GetKeyError          ' 处理错误...
    
    tmpVal = String$(1024, 0)                             ' 分配变量空间
    KeyValSize = 1024                                       ' 标记变量尺寸
    
    '------------------------------------------------------------
    ' 检索注册表关键字的值...
    '------------------------------------------------------------
    rc = RegQueryValueEx(hKey, SubKeyRef, 0, _
                         KeyValType, tmpVal, KeyValSize)    ' 获得/创建关键字值
                        
    If (rc <> ERROR_SUCCESS) Then GoTo GetKeyError          ' 处理错误
    
    If (Asc(Mid(tmpVal, KeyValSize, 1)) = 0) Then           ' Win95 外接程序空终结字符串...
        tmpVal = Left(tmpVal, KeyValSize - 1)               ' Null 被找到,从字符串中分离出来
    Else                                                    ' WinNT 没有空终结字符串...
        tmpVal = Left(tmpVal, KeyValSize)                   ' Null 没有被找到, 分离字符串
    End If
    '------------------------------------------------------------
    ' 决定转换的关键字的值类型...
    '------------------------------------------------------------
    Select Case KeyValType                                  ' 搜索数据类型...
    Case REG_SZ                                             ' 字符串注册关键字数据类型
        KeyVal = tmpVal                                     ' 复制字符串的值
    Case REG_DWORD                                          ' 四字节的注册表关键字数据类型
        For i = Len(tmpVal) To 1 Step -1                    ' 将每位进行转换
            KeyVal = KeyVal + Hex(Asc(Mid(tmpVal, i, 1)))   ' 生成值字符。 By Char。
        Next
        KeyVal = Format$("&h" + KeyVal)                     ' 转换四字节的字符为字符串
    End Select
    
    GetKeyValue = True                                      ' 返回成功
    rc = RegCloseKey(hKey)                                  ' 关闭注册表关键字
    Exit Function                                           ' 退出
    
GetKeyError:      ' 错误发生后将其清除...
    KeyVal = ""                                             ' 设置返回值到空字符串
    GetKeyValue = False                                     ' 返回失败
    rc = RegCloseKey(hKey)                                  ' 关闭注册表关键字
End Function

Private Sub Label1_Click()

End Sub

Private Sub xptopbuttons1_Click()
Unload Me
End Sub

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