frmabout.frm

学籍管理系统 建立学生学籍管理系统

VERSION 5.00
Begin VB.Form frmAbout 
   BorderStyle     =   1  'Fixed Single
   Caption         =   "关于   学籍管理系统"
   ClientHeight    =   2985
   ClientLeft      =   45
   ClientTop       =   330
   ClientWidth     =   5625
   ControlBox      =   0   'False
   LinkTopic       =   "Form1"
   MaxButton       =   0   'False
   MDIChild        =   -1  'True
   MinButton       =   0   'False
   ScaleHeight     =   2985
   ScaleWidth      =   5625
   Begin VB.Frame Frame1 
      Caption         =   "关于  学生成绩管理系统"
      Height          =   1335
      Left            =   960
      TabIndex        =   4
      Top             =   120
      Width           =   4455
      Begin VB.Label Label1 
         Caption         =   $"frmAbout.frx":0000
         Height          =   855
         Left            =   240
         TabIndex        =   5
         Top             =   360
         Width           =   4095
      End
   End
   Begin VB.CommandButton Command1 
      Caption         =   "确定(&Y)"
      Height          =   375
      Left            =   4200
      TabIndex        =   3
      Top             =   1920
      Width           =   1215
   End
   Begin VB.Frame Frame2 
      Height          =   975
      Left            =   240
      TabIndex        =   2
      Top             =   1800
      Width           =   3735
   End
   Begin VB.PictureBox picIcon 
      AutoSize        =   -1  'True
      BackColor       =   &H00C0C0C0&
      ClipControls    =   0   'False
      Height          =   540
      Left            =   240
      Picture         =   "frmAbout.frx":00A4
      ScaleHeight     =   480
      ScaleMode       =   0  'User
      ScaleWidth      =   480
      TabIndex        =   1
      TabStop         =   0   'False
      Top             =   240
      Width           =   540
   End
   Begin VB.CommandButton Command2 
      Caption         =   "系统信息(&S)"
      Height          =   375
      Left            =   4200
      TabIndex        =   0
      Top             =   2400
      Width           =   1215
   End
   Begin VB.Line Line1 
      BorderColor     =   &H00808080&
      BorderStyle     =   6  'Inside Solid
      Index           =   1
      X1              =   240
      X2              =   5400
      Y1              =   1680
      Y2              =   1680
   End
End
Attribute VB_Name = "frmAbout"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
' 注册键安全选项...
Const KEY_ALL_ACCESS = &H2003F
' 注册键根类型...
Const HKEY_LOCAL_MACHINE = &H80000002
Const ERROR_SUCCESS = 0
Const REG_SZ = 1                         ' Unicode 空结尾字符串
Const REG_DWORD = 4                      ' 32位数
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
Public Sub StartSysInfo()
    On Error GoTo SysInfoErr
        Dim rc As Long
        Dim SysInfoPath As String
        ' 从注册表获得系统信息程序路径\名称...
        If GetKeyValue(HKEY_LOCAL_MACHINE, gREGKEYSYSINFO, gREGVALSYSINFO, SysInfoPath) Then
        ' 仅从注册表获得系统信息程序路径...
        ElseIf GetKeyValue(HKEY_LOCAL_MACHINE, gREGKEYSYSINFOLOC, gREGVALSYSINFOLOC, SysInfoPath) Then
                ' 验证已知的 32 位文件版本的存在
                If (Dir(SysInfoPath & "\MSINFO32.EXE") <> "") Then
                        SysInfoPath = SysInfoPath & "\MSINFO32.EXE"
                ' 错误 - 文件找不到...
                Else
                        GoTo SysInfoErr
                End If
        ' 错误 - 注册表项找不到...
        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                                           ' 循环记数器
        Dim rc As Long                                          ' 返回代码
        Dim hKey As Long                                        ' 打开的注册表键句柄
        Dim hDepth As Long                                      '
        Dim KeyValType As Long                                  ' 注册表键数据类型
        Dim tmpVal As String                                    ' 临时存储一个注册表键值
        Dim KeyValSize As Long                                  ' 注册表键变量大小
        '------------------------------------------------------------
        ' 在键根{HKEY_LOCAL_MACHINE...}之下打开注册键
        '------------------------------------------------------------
        rc = RegOpenKeyEx(KeyRoot, KeyName, 0, KEY_ALL_ACCESS, hKey) ' 打开注册表键
        If (rc <> ERROR_SUCCESS) Then GoTo GetKeyError          ' 错误处理...
        tmpVal = String$(1024, 0)                             ' 分配变量空间
        KeyValSize = 1024                                       ' 标记变量大小
        '------------------------------------------------------------
        ' 检索注册表键值...
        '------------------------------------------------------------
        rc = RegQueryValueEx(hKey, SubKeyRef, 0, KeyValType, tmpVal, KeyValSize)    ' 获得/创建键值
        If (rc <> ERROR_SUCCESS) Then GoTo GetKeyError          ' 错误处理
        tmpVal = VBA.Left(tmpVal, InStr(tmpVal, VBA.Chr(0)) - 1)
        '------------------------------------------------------------
        ' 决定转换的键值类型...
        '------------------------------------------------------------
        Select Case KeyValType                                  ' 搜索数据类型...
        Case REG_SZ                                             ' 字符串注册表键数据类型
                KeyVal = tmpVal                                     ' 复制字符串值
        Case REG_DWORD                                          ' 双精度注册表键数据类型
                For i = Len(tmpVal) To 1 Step -1                    ' 转换每一页
                        KeyVal = KeyVal + Hex(Asc(Mid(tmpVal, i, 1)))   ' 一个字符一个字符地生成值
                Next
                KeyVal = Format$("&h" + KeyVal)                     ' 转换双精度为字符串
        End Select
        GetKeyValue = True                                      ' 返回成功
        rc = RegCloseKey(hKey)                                  ' 关闭注册表键
        Exit Function                                           ' 退出
GetKeyError:    ' Cleanup After An Error Has Occured...
        KeyVal = ""                                             ' 设返回值为空字符串
        GetKeyValue = False                                     ' 返回失败
        rc = RegCloseKey(hKey)                                  ' 关闭注册表键
End Function
Private Sub Command1_Click()
Unload Me
End Sub

Private Sub Command2_Click()
 Call StartSysInfo
End Sub

Private Sub Form_Load()
Me.Move (frmMain.ScaleWidth - Me.Width) / 2, (frmMain.ScaleHeight - Me.Height) / 2
End Sub