FILE: Integrating a PowerPoint 7.0 Slide Show w/Visual Basic

ID: Q143038

The information in this article applies to:
  • Microsoft Visual Basic Standard, Professional, and Enterprise Editions for Windows, version 4.0
  • Microsoft PowerPoint for Windows 95, version 7.0

SUMMARY

This article describes how to perform some common integration tasks with Microsoft PowerPoint version 7.0 for Windows using Microsoft Visual Basic version 4.0 for Windows. It also discusses how to use OLE Automation with PowerPoint and how to use the PowerPoint Viewer.

Creating and Running a Simple Presentation

  1. Create a new project in Visual Basic.


  2. On the Tools menu, click References, and check "PowerPoint 7.0 Object Library" in the list box.


  3. Put a command button on Form1, and click View Code from the Project window.


  4. Paste the following code in the General Declarations section: 
    
   '---------------------------------------------------------------------
   ' PPTester.frm - PowerPoint 7.0 OLE Automation tester.
   '---------------------------------------------------------------------
   Private PowerPoint As PowerPoint.Application
   Private mblnPowerPointStarted As Boolean

   '---------------------------------------------------------------------
   ' Creates and runs the presentation.
   '---------------------------------------------------------------------
   Private Sub Command1_Click()
       Dim pptPres As Presentation ' Presentation Object (your PPT file).
       Dim pptSlide As Slide       ' Slide Object (the current slide).

    '-----------------------------------------------------------------
    ' Establish a connection with PowerPoint.
    '-----------------------------------------------------------------
    mblnPowerPointStarted = _
    OLEConnect(PowerPoint, "PowerPoint.Application")

    '-----------------------------------------------------------------
    ' Make PowerPoint visible.
    '-----------------------------------------------------------------
    If MsgBox _
      ("Would you like to watch the building of the presentation?", _
       vbYesNo) = vbYes Then PowerPoint.AppWindow.Visible = True

    '-----------------------------------------------------------------
    ' Add a new (blank) presentation to PowerPoint.
    '-----------------------------------------------------------------
    Set pptPres = PowerPoint.Presentations.Add

    '-----------------------------------------------------------------
    ' Add the first slide to the empty presentation.
    '-----------------------------------------------------------------
    Set pptSlide = pptPres.Slides.Add(1, ppLayoutTitle)

    '-----------------------------------------------------------------
    ' Set the slide background to the Parchment shade that is built
    ' into PowerPoint.
    '-----------------------------------------------------------------
    pptSlide.Background.Fill.PresetShaded ppShadeFromTitle, 2, _
        ppPresetShadeParchment

    '-----------------------------------------------------------------
    ' Change the text, background, and text color of the first object.
    '-----------------------------------------------------------------
    With pptSlide.Objects(1)
        .Text = "Welcome to OLE Automation"
        .GraphicFormat.Fill.PresetTextured ppPresetTextureGreenMarble
        .Text.Font.Color.RGB = vbWhite
    End With

    '-----------------------------------------------------------------
    ' Configure this slide to display for 25 seconds, and disappear as
    ' it is displayed.
    '-----------------------------------------------------------------
    With pptSlide.SlideShowEffects
        .AdvanceTime = 5
        .EntryEffect = ppEffectDissolve
    End With

    '-----------------------------------------------------------------
    ' Add a second slide at the end.
    '-----------------------------------------------------------------
    Set pptSlide = pptPres.Slides.Add(2, ppLayoutTitleOnly)

    '-----------------------------------------------------------------
    ' Display the new slide.
    '-----------------------------------------------------------------
    PowerPoint.ActiveWindow.View.GotoSlide 2

    '-----------------------------------------------------------------
    ' Begin modifications to the new slide.
    '-----------------------------------------------------------------
    With pptSlide
        '-------------------------------------------------------------
        ' Set up the slide show effects for this slide.
        '-------------------------------------------------------------
        With .SlideShowEffects
            .AdvanceTime = 5
            .EntryEffect = ppEffectDissolve
        End With

        '-------------------------------------------------------------
        ' Change the background to a gradient fill.
        '-------------------------------------------------------------
        With .Background.Fill
            .ForeColor.RGB = RGB(128, 0, 0)
            .OneColorShaded ppShadeFromTitle, 4, -0.05
        End With

        '-------------------------------------------------------------
        ' Change the title (using the title object).
        '-------------------------------------------------------------
        .Objects.Title.Text = "Examples"

        '-------------------------------------------------------------
        ' Modify the title using Objects(1).
        '-------------------------------------------------------------
        With .Objects(1)
            '---------------------------------------------------------
            ' Change the text to embossed.
            '---------------------------------------------------------
            .Text.Font.Embossed = ppTrue

            '---------------------------------------------------------
            ' Add a shaded background for the slide.
            '---------------------------------------------------------
            .GraphicFormat.Fill.OneColorShaded ppShadeHorizontal, _
               4, -0.05

            '---------------------------------------------------------
            ' Change the object border to embossed.
            '---------------------------------------------------------
            .GraphicFormat.Shadow.Type = ppShadowEmbossed
        End With
    End With
    '-----------------------------------------------------------------
    ' Run the slide show.
    '-----------------------------------------------------------------
    With pptPres.SlideShow
        .AdvanceMode = ppSlideShowUseSlideTimings
        .Run ppSlideShowFullScreen
    End With

End Sub

   '---------------------------------------------------------------------
   ' Terminates PowerPoint if this application started it.
   '---------------------------------------------------------------------
   Private Sub Form_Unload(Cancel As Integer)
       If mblnPowerPointStarted Then PowerPoint.Quit
   End Sub

   '---------------------------------------------------------------------
   ' OLEConnect takes a pointer to an object variable and class name. If
   ' this function is successful, then the function returns true and the
   ' obj argument points to a valid OLE Automation object.
   '----------------------------------------------------------------------
   Private Function OLEConnect(obj As Object, sClass As String) As Boolean
    '------------------------------------------------------------------
    ' Temporarily turn off error handling.
    '-----------------------------------------------------------------
    On Error Resume Next
    Set obj = GetObject(, sClass)

    '-----------------------------------------------------------------
    ' If GetObject failed, then try Create.
    '-----------------------------------------------------------------
    If Err = 429 Then
        '-------------------------------------------------------------
        ' Resume Error Handling.
        '-------------------------------------------------------------
        On Error GoTo OLEConnect_Err
        Set obj = CreateObject(sClass)

        '-------------------------------------------------------------
        ' If this line was executed, then the app was started.
        '-------------------------------------------------------------
        OLEConnect = True

    '-----------------------------------------------------------------
    ' If any other error occurs, then display it and exit.
    '-----------------------------------------------------------------
    ElseIf Err <> 0 Then
        GoSub OLEConnect_Err
    End If

    Exit Function

   '---------------------------------------------------------------------
   ' Display error message and abort.
   '---------------------------------------------------------------------
   OLEConnect_Err:
       MsgBox Err.Description, vbCritical
       Unload Me
       Exit Function
   End Function


  5. Run the program, and click Command1.


Running a Presentation on Systems without PowerPoint

If you plan to distribute your application to systems that do not have PowerPoint installed, then you cannot use OLE Automation. You can work around this limitation by using the PowerPoint Viewer (PPTVIEW.EXE) with the name of the slide. The following code demonstrates how to use the PowerPoint Viewer to run a slide show from Visual Basic: 

       '----------------------------------------------------------
       ' The following code assumes that PPTVIEW.EXE and your
       ' slides file are in the same directory as your EXE.
       '----------------------------------------------------------
       Shell App.Path & "pptview.exe " & App.Path & "myslides.ppt"
   End Sub


MORE INFORMATION

A complete (and enhanced) PowerPoint OLE Automation sample is now available. The following file is available for download from the Microsoft Download Center. Click the file name below to download the file:

Vbappt7.exe
For more information about how to download files from the Microsoft Download Center, please visit the Download Center at the following Web address
http://www.microsoft.com/downloads/search.asp
and then click How to use the Microsoft Download Center.

Additional query words:

Keywords : kbinterop kbprg kbsample VB4WIN vbwin
Version : WINDOWS:4.0,7.0
Platform : WINDOWS
Issue type :


Last Reviewed: December 4, 1999
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