VERSION 5.00
Begin VB.Form frmAbout 
   BackColor       =   &H00FFFFC0&
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "關(guān)于"
   ClientHeight    =   3555
   ClientLeft      =   2340
   ClientTop       =   1935
   ClientWidth     =   5730
   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          =   960
      Left            =   0
      Picture         =   "frmAbout.frx":0000
      ScaleHeight     =   632.1
      ScaleMode       =   0  'User
      ScaleWidth      =   705.845
      TabIndex        =   1
      Top             =   120
      Width           =   1065
   End
   Begin VB.CommandButton cmdOK 
      Cancel          =   -1  'True
      Caption         =   "確定"
      Default         =   -1  'True
      Height          =   345
      Left            =   4125
      TabIndex        =   0
      Top             =   2880
      Width           =   1500
   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 
      AutoSize        =   -1  'True
      Caption         =   "此程序是為了方便學生資料管理而開發(fā)的"
      ForeColor       =   &H00000000&
      Height          =   180
      Left            =   1200
      TabIndex        =   2
      Top             =   1125
      Width           =   3240
   End
   Begin VB.Label lblTitle 
      AutoSize        =   -1  'True
      Caption         =   "學生信息管理系統(tǒng)"
      BeginProperty Font 
         Name            =   "宋體"
         Size            =   15
         Charset         =   134
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00000000&
      Height          =   300
      Left            =   1200
      TabIndex        =   4
      Top             =   240
      Width           =   2400
   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 
      AutoSize        =   -1  'True
      Caption         =   "版本:1.0"
      Height          =   180
      Left            =   1200
      TabIndex        =   5
      Top             =   780
      Width           =   720
   End
   Begin VB.Label lblDisclaimer 
      Caption         =   "警告:本程序版權(quán)屬于修改本程序，為本程序       提出寶貴意見的人"
      ForeColor       =   &H00000000&
      Height          =   660
      Left            =   120
      TabIndex        =   3
      Top             =   2520
      Width           =   3660
   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(guān)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(guān)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(jié)字符串
Const REG_DWORD = 4                      ' 32位數(shù)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(guān)于 "
    lblVersion.Caption = "版本 " & App.Major & "." & App.Minor & "." & App.Revision
    lblTitle.Caption = "學生信息管理系統(tǒng)"
End Sub

Public Sub StartSysInfo()
    On Error GoTo SysInfoErr
  
    Dim rc As Long
    Dim SysInfoPath As String
    
    ' 試圖從注冊表中獲得系統(tǒng)信息程序的路徑及名稱...
    If GetKeyValue(HKEY_LOCAL_MACHINE, gREGKEYSYSINFO, gREGVALSYSINFO, SysInfoPath) Then
    ' 試圖僅從注冊表中獲得系統(tǒng)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"
            
        ' 錯誤 - 文件不能被找到...
        Else
            GoTo SysInfoErr
        End If
    ' 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 "此時系統(tǒng)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(huán)計數(shù)器
    Dim rc As Long                                          ' 返回代碼
    Dim hKey As Long                                        ' 打開的注冊表關(guān)鍵字句柄
    Dim hDepth As Long                                      '
    Dim KeyValType As Long                                  ' 注冊表關(guān)鍵字數(shù)據(jù)類型
    Dim tmpVal As String                                    ' 注冊表關(guān)鍵字值的臨時存儲器
    Dim KeyValSize As Long                                  ' 注冊表關(guān)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(guān)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(guān)鍵字的值...
    '------------------------------------------------------------
    rc = RegQueryValueEx(hKey, SubKeyRef, 0, _
                         KeyValType, tmpVal, KeyValSize)    ' 獲得/創(chuàng)建關(guān)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(jié)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(jié)字符串...
        tmpVal = Left(tmpVal, KeyValSize)                   ' Null 沒有被找到, 分離字符串
    End If
    '------------------------------------------------------------
    ' 決定轉(zhuǎn)換的關(guān)鍵字的值類型...
    '------------------------------------------------------------
    Select Case KeyValType                                  ' 搜索數(shù)據(jù)類型...
    Case REG_SZ                                             ' 字符串注冊關(guān)鍵字數(shù)據(jù)類型
        KeyVal = tmpVal                                     ' 復制字符串的值
    Case REG_DWORD                                          ' 四字節(jié)的注冊表關(guān)鍵字數(shù)據(jù)類型
        For i = Len(tmpVal) To 1 Step -1                    ' 將每位進行轉(zhuǎn)換
            KeyVal = KeyVal + Hex(Asc(Mid(tmpVal, i, 1)))   ' 生成值字符。 By Char。
        Next
        KeyVal = Format$("&h" + KeyVal)                     ' 轉(zhuǎn)換四字節(jié)的字符為字符串
    End Select
    
    GetKeyValue = True                                      ' 返回成功
    rc = RegCloseKey(hKey)                                  ' 關(guān)閉注冊表關(guān)鍵字
    Exit Function                                           ' 退出
    
GetKeyError:      ' 錯誤發(fā)生后將其清除...
    KeyVal = ""                                             ' 設(shè)置返回值到空字符串
    GetKeyValue = False                                     ' 返回失敗
    rc = RegCloseKey(hKey)                                  ' 關(guān)閉注冊表關(guān)鍵字
End Function