Как из программы создать книгу Excel - VB

'создаеш 1 textbox (caption=Text1) и 3 CommandButton 
'(bttnNew, bttnCalculate, bttnExit
 
Dim AppExcel As Excel.Application
 
Private Sub bttnNew_Click()
    StartExcel
    MakeSheet
 
    AppExcel.Range('A2:E3').Select
    Set CData = AppExcel.Selection
    For icol = 1 To 5
        For irow = 1 To 2
            Text1.Text = Text1.Text & Chr(9) & CData(irow, icol)
        Next
        Text1.Text = Text1.Text & vbCrLf
    Next
        
    PrintSheet
    SaveSheet
    TerminateExcel
End Sub
 
Sub StartExcel()
    Screen.MousePointer = vbHourglass
    Set AppExcel = CreateObject('Excel.Application')
    Screen.MousePointer = vbDefault
End Sub
 
Sub MakeSheet()
Dim wSheet As Worksheet
Dim wBook As Workbook
 
    Set wBook = AppExcel.Workbooks.Add
    Set wSheet = AppExcel.Sheets(1)
    wSheet.Cells(2, 1).Value = '1st Quarter'
    wSheet.Cells(2, 2).Value = '2nd Quarter'
    wSheet.Cells(2, 3).Value = '3rd Quarter'
    wSheet.Cells(2, 4).Value = '4th Quarter'
    wSheet.Cells(2, 5).Value = 'Year Total'
    
    wSheet.Cells(3, 1).Value = 123.45
    wSheet.Cells(3, 2).Value = 435.56
    wSheet.Cells(3, 3).Value = 376.25
    wSheet.Cells(3, 4).Value = 425.75
 
' Format column Headings
    Range('A2:E2').Select
    With Selection.Font
        .Name = 'Verdana'
        .FontStyle = 'Bold'
        .Size = 12
    End With
    Range('A2:E2').Select
    Selection.Columns.AutoFit
    Selection.ColumnWidth = Selection.ColumnWidth * 1.25
    Range('A2:E2').Select
    With Selection
        .HorizontalAlignment = xlCenter
    End With
' Format numbers
    Range('A3:E3').Select
    With Selection.Font
        .Name = 'Verdana'
        .FontStyle = 'Regular'
        .Size = 11
    End With
    wSheet.Cells(3, 5).Value = '=Sum(A3:D3)'
    MsgBox 'The year total is ' & wSheet.Cells(3, 5).Value
   
End Sub
 
Sub SaveSheet()
    AppExcel.AlertBeforeOverwriting = False
On Error Resume Next
    AppExcel.Sheets(1).SaveAs FileName:='c:sales.xls'
End Sub
 
Sub PrintSheet()
    AppExcel.ActiveWorkbook.PrintOut
End Sub
 
Sub TerminateExcel()
    AppExcel.ActiveWorkbook.Close False
    AppExcel.Quit
    Set AppExcel = Nothing
End Sub
 
Private Sub bttnExit_Click()
    End
End Sub
 
Private Sub bttnCalculate_Click()
Dim wSheet As Worksheet
Dim wBook As Workbook
Dim expression
    
    StartExcel
    expression = InputBox('Enter math expression to evaluate (i.e., 1/cos(3.45)*log(19.004)')
On Error GoTo CalcError
    If Trim(expression) <> '' Then
        MsgBox AppExcel.Evaluate(expression)
    End If
    GoTo Terminate
    Exit Sub
 
CalcError:
    MsgBox 'Excel returned the following error: ' & vbCrLf & Err.Description
Terminate:
    AppExcel.Quit
    Set AppExcel = Nothing
End Sub
 
Private Sub Form_Terminate()
    Set AppExcel = Nothing
End Sub