VERSION 5.00
Begin VB.Form frmDisplayBooks 
   Caption         =   "Display Books"
   ClientHeight    =   1932
   ClientLeft      =   1548
   ClientTop       =   3036
   ClientWidth     =   6048
   LinkTopic       =   "Form1"
   ScaleHeight     =   1932
   ScaleWidth      =   6048
   Begin VB.CommandButton cmdSelectBook 
      Caption         =   "Select Book"
      Height          =   372
      Left            =   4440
      TabIndex        =   6
      Top             =   720
      Width           =   1452
   End
   Begin VB.CommandButton cmdDone 
      Caption         =   "Done"
      Height          =   372
      Left            =   4440
      TabIndex        =   5
      Top             =   1320
      Width           =   1452
   End
   Begin VB.CommandButton cmdViewNextBook 
      Caption         =   "View Next Book"
      Height          =   372
      Left            =   4440
      TabIndex        =   4
      Top             =   240
      Width           =   1452
   End
   Begin VB.TextBox txtAuthor 
      Height          =   288
      Left            =   1080
      TabIndex        =   3
      Top             =   720
      Width           =   2292
   End
   Begin VB.TextBox txtTitle 
      Height          =   288
      Left            =   840
      TabIndex        =   1
      Top             =   240
      Width           =   2892
   End
   Begin VB.Line Line1 
      BorderWidth     =   2
      X1              =   4440
      X2              =   5880
      Y1              =   1200
      Y2              =   1200
   End
   Begin VB.Label lblAuthor 
      Caption         =   "Author:"
      Height          =   252
      Left            =   240
      TabIndex        =   2
      Top             =   720
      Width           =   732
   End
   Begin VB.Label lblTitle 
      Caption         =   "Title:"
      Height          =   252
      Left            =   240
      TabIndex        =   0
      Top             =   240
      Width           =   492
   End
End
Attribute VB_Name = "frmDisplayBooks"
Attribute VB_GlobalNameSpace = False
Attribute VB_Creatable = False
Attribute VB_PredeclaredId = True
Attribute VB_Exposed = False
Option Explicit

Private Type BookRecord
    strTitle As String * 30
    strAuthor As String * 30
End Type

Private Sub Form_Load()
    Call InitializeForm
End Sub

'****************************************************
'   Clears form
'
'   post: Text boxes on form are empty
'****************************************************
Sub InitializeForm()
    txtTitle.Text = ""
    txtAuthor.Text = ""
End Sub

Private Sub cmdSelectBook_Click()
    frmGiftOrderForm.lstBooksOrdered.AddItem txtTitle.Text
End Sub

Private Sub cmdViewNextBook_Click()
    Dim udtNewBook As BookRecord
    Dim intBookFile As Integer, lngRecLength As Long
    Dim lngTotalRecords As Long
    Static lngRecNum As Long

    'Open file
    intBookFile = FreeFile
    lngRecLength = LenB(udtNewBook)
    Open "Giftbooks.dat" For Random As #intBookFile _
        Len = lngRecLength

    'Determine number of records
    lngTotalRecords = NumRecords(intBookFile, lngRecLength)

    'View record if valid
    If lngRecNum < lngTotalRecords Then
        lngRecNum = lngRecNum + 1
    Else
        lngRecNum = 1
    End If
    Get #intBookFile, lngRecNum, udtNewBook
    txtTitle.Text = udtNewBook.strTitle
    txtAuthor.Text = udtNewBook.strAuthor

    'Close file
    Close #intBookFile
End Sub

'*************************************************************
'   Returns the number of records in the file with intFileNum
'   file number containing records of length lngRecLength
'
'   pre: intFileNum is open
'   post: Number of records in intFileNum returned
'*************************************************************
Function NumRecords(ByVal intFileNum As Integer, _
ByVal lngRecLength As Long) As Integer
    If LOF(intFileNum) Mod lngRecLength = 0 Then
        NumRecords = (LOF(intFileNum) \ lngRecLength)
    Else
        NumRecords = (LOF(intFileNum) \ lngRecLength) + 1
    End If
End Function

Private Sub cmdDone_Click()
    Unload Me
End Sub