frmabout.frm

Library Management System 1

VERSION 5.00
Begin VB.Form frmAbout 
   BackColor       =   &H0000FFFF&
   BorderStyle     =   3  'Fixed Dialog
   Caption         =   "About "
   ClientHeight    =   4995
   ClientLeft      =   2340
   ClientTop       =   1935
   ClientWidth     =   5910
   ClipControls    =   0   'False
   ControlBox      =   0   'False
   Icon            =   "frmAbout.frx":0000
   LockControls    =   -1  'True
   MaxButton       =   0   'False
   MinButton       =   0   'False
   Picture         =   "frmAbout.frx":24A2
   ScaleHeight     =   3447.638
   ScaleMode       =   0  'User
   ScaleWidth      =   5549.795
   ShowInTaskbar   =   0   'False
   Begin VB.PictureBox Picture1 
      Height          =   3735
      Left            =   0
      Picture         =   "frmAbout.frx":14D59
      ScaleHeight     =   3675
      ScaleWidth      =   5835
      TabIndex        =   3
      Top             =   0
      Width           =   5895
   End
   Begin VB.CommandButton cmdOK 
      BackColor       =   &H00C0E0FF&
      Cancel          =   -1  'True
      Caption         =   "OK"
      Default         =   -1  'True
      Height          =   345
      Left            =   4200
      Style           =   1  'Graphical
      TabIndex        =   0
      Top             =   3960
      UseMaskColor    =   -1  'True
      Width           =   1500
   End
   Begin VB.CommandButton cmdSysInfo 
      BackColor       =   &H00C0E0FF&
      Caption         =   "&System Info..."
      Height          =   345
      Left            =   4200
      Style           =   1  'Graphical
      TabIndex        =   1
      Top             =   4440
      Width           =   1485
   End
   Begin VB.Label Label1 
      BackColor       =   &H0000FFFF&
      Caption         =   "[e-mail]"
      BeginProperty Font 
         Name            =   "Comic Sans MS"
         Size            =   11.25
         Charset         =   0
         Weight          =   700
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      Height          =   375
      Left            =   480
      TabIndex        =   4
      Top             =   4440
      Width           =   3015
   End
   Begin VB.Label lbl_feed 
      BackColor       =   &H0000FFFF&
      Caption         =   "If you really like this project,give your feedback to me on my mailaddress"
      BeginProperty Font 
         Name            =   "Comic Sans MS"
         Size            =   9.75
         Charset         =   0
         Weight          =   400
         Underline       =   0   'False
         Italic          =   0   'False
         Strikethrough   =   0   'False
      EndProperty
      ForeColor       =   &H00400000&
      Height          =   585
      Left            =   240
      TabIndex        =   2
      Top             =   3840
      Width           =   3615
   End
End
Attribute VB_Name = "frmAbout"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
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

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

Private Sub Form_Load()
  Me.Top = 3000
  Me.Left = (Screen.Width - Me.Width) / 2
 End Sub