VERSION 5.00
Object = "{BDC217C8-ED16-11CD-956C-0000C04E4C0A}#1.1#0"; "TABCTL32.OCX"
Begin VB.Form frmData 
   ClientHeight    =   5355
   ClientLeft      =   60
   ClientTop       =   345
   ClientWidth     =   8025
   LinkTopic       =   "Form1"
   ScaleHeight     =   5355
   ScaleWidth      =   8025
   StartUpPosition =   3  'Windows Default
   Begin VB.ListBox lstBooks 
      Height          =   2985
      Left            =   1200
      TabIndex        =   5
      Top             =   1680
      Width           =   6375
   End
   Begin VB.CommandButton cmdPrev 
      Caption         =   "Back"
      Height          =   495
      Left            =   1200
      TabIndex        =   4
      Top             =   2160
      Width           =   1215
   End
   Begin VB.CommandButton cmdNext 
      Caption         =   "Next"
      Height          =   495
      Left            =   2520
      TabIndex        =   3
      Top             =   2160
      Width           =   1215
   End
   Begin VB.TextBox txtAuthor 
      Height          =   285
      Left            =   1200
      TabIndex        =   2
      Top             =   1800
      Width           =   2895
   End
   Begin TabDlg.SSTab tabData 
      Height          =   3855
      Left            =   720
      TabIndex        =   1
      Top             =   1080
      Width           =   7005
      _ExtentX        =   12356
      _ExtentY        =   6800
      _Version        =   393216
      MousePointer    =   14
      Tabs            =   2
      TabsPerRow      =   2
      TabHeight       =   520
      TabCaption(0)   =   "Author"
      Tab(0).ControlEnabled=   -1  'True
      Tab(0).ControlCount=   0
      TabCaption(1)   =   "Books"
      Tab(1).ControlEnabled=   0   'False
      Tab(1).ControlCount=   0
   End
   Begin VB.CommandButton cmdGo 
      Caption         =   "GO !"
      Height          =   495
      Left            =   6720
      TabIndex        =   0
      Top             =   240
      Width           =   1215
   End
End
Attribute VB_Name = "frmData"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
'uses components : Sheridan Tab Dialog Controll - SStab
Option Explicit
    Dim CN As ADODB.Connection
    Dim rsAuthors As ADODB.Recordset
    Dim rsBoeken As ADODB.Recordset
    Private Sub Database()
    'connect
    Set CN = New ADODB.Connection
    CN.ConnectionString = "Provider = Microsoft.Jet.OLEDB.4.0;" & _
        "Data Source=E:\Microsoft Visual Studio\VB98\BIBLIO.MDB"
    CN.Open

    End Sub
Private Sub MakeRecordSetAuthors()
    
    Set rsAuthors = New ADODB.Recordset
    rsAuthors.ActiveConnection = CN
    rsAuthors.Source = "SELECT * FROM Authors"
    rsAuthors.Open
      
    
End Sub
Private Sub MakeRecordSetBoeken(intAuthor As Integer)

    Dim strSQL As String
    
    strSQL = " select * from Titles, [Title Author] Linked  " _
            & "where Titles.ISBN = Linked.ISBN " _
            & "AND Linked.Au_ID = " & intAuthor & ";"
    
    Set rsBoeken = New ADODB.Recordset
    rsBoeken.ActiveConnection = CN
    rsBoeken.Source = strSQL
    rsBoeken.Open
    
End Sub
Private Sub Afsluiten()
    
    rsAuthors.Close
    Set rsAuthors = Nothing
    CN.Close
    Set CN = Nothing
End Sub

Private Sub cmdGo_Click()
    Database
    MakeRecordSetAuthors
 
End Sub

Private Function AantalRecords() As Integer
    AantalRecords = 0
    Do While Not rsAuthors.EOF
        AantalRecords = AantalRecords + 1
        rsAuthors.MoveNext
    Loop

End Function
    
Private Sub cmdNext_Click()
    rsAuthors.MoveNext
    txtAuthor.Text = rsAuthors.Fields(1).Value
End Sub

Private Sub cmdPrev_Click()
    'rsAuthors.MovePrevious
    txtAuthor.Text = rsAuthors.Fields(1).Value
End Sub

Private Sub tabData_Click(PreviousTab As Integer)
    'components in tab moeten visible/enabled (of niet)
    'gezet worden afhankelijk van het geselecteerde tabblad
    'dit gaat niet vanzelf
    
    'bijv. :
    Select Case tabData.Tab     'tabData.Tab is het nummer van de tab, re. properties
        Case 0
            cmdNext.Visible = True
            cmdNext.Enabled = True
            cmdPrev.Visible = True
            cmdPrev.Enabled = True
            
            lstBooks.Visible = False
            
        Case 1
            cmdNext.Visible = False
            cmdNext.Enabled = False
            cmdPrev.Visible = False
            cmdPrev.Enabled = False
            
            lstBooks.Visible = True
    End Select
    
    'of : met index 0/1 als true/false
    
    'in andere gevallen : contrall arrays gebruiken,
    'zodat index van controll overeenkomt met nummer van tab,
    'zodat daarmee gewerkt kan worden.
    '(ander voorbeeldprogramma maken ?)
    
    ' procedures volgens tab-index
    If tabData.Tab = 1 Then
    'corresponderende boeken ophalen
    
    Dim intAuthor_ID As Integer
    Dim strSQL As String
    
    'make rs
    'dit klan beter in aparte procedure ,
    'maar ter illustratie van  tab is dit voldoende
    
    intAuthor_ID = rsAuthors.Fields(0).Value
    strSQL = " select * from Titles, [Title Author] Linked  " _
            & "where Titles.ISBN = Linked.ISBN " _
            & "AND Linked.Au_ID = " & intAuthor_ID & ";"
    
    Set rsBoeken = New ADODB.Recordset
    rsBoeken.ActiveConnection = CN
    rsBoeken.Source = strSQL
    rsBoeken.Open
    
    'Dump to listbox
    Dim i As Integer
    lstBooks.Clear
    While Not rsBoeken.EOF
        For i = 0 To (rsBoeken.Fields.Count - 1)
            If rsBoeken.Fields(i) <> vbNullString Then
                lstBooks.AddItem rsBoeken.Fields(i).Value
            End If
        Next i
        rsBoeken.MoveNext
    Wend
    rsBoeken.Close
    Set rsBoeken = Nothing
    End If
End Sub