PPT: Sample Code to Change the Zoom Percentage

• Microsoft PowerPoint 98 Macintosh Edition
• Microsoft PowerPoint 97 for Windows

SUMMARY

This article contains a sample Microsoft Visual Basic for Applications macro (Sub procedure) that reduces the zoom percentage to one-half of the current zoom percentage, and then provides an option to restore the original zoom setting.

MORE INFORMATION

Microsoft provides programming examples for illustration only, without warranty either expressed or implied, including, but not limited to, the implied warranties of merchantability and/or fitness for a particular purpose. This article assumes that you are familiar with the programming language being demonstrated and the tools used to create and debug procedures. Microsoft support engineers can help explain the functionality of a particular procedure, but they will not modify these examples to provide added functionality or construct procedures to meet your specific needs. If you have limited programming experience, you may want to contact the Microsoft fee-based consulting line at (800) 936-5200. For more information about the support options available from Microsoft, please see the following page on the World Wide Web:

   http://www.microsoft.com/support/supportnet/refguide/default.asp

Sample Visual Basic Procedure

   Sub ChangeView()

      ' The smallest percentage you can use is 10%.
      Const MinViewPercent As Long = 10

      ' The largest percentage you can use is 400%.
      Const MaxViewPercent As Long = 400

      ' Stores the results of the MsgBox selection.
      Dim lResult As Long

      Dim lCurrentViewPercentage As Long
      Dim lNewViewPercentage As Long

      ' Get the current view percentage.
      lCurrentViewPercentage = ActiveWindow.View.Zoom

      ' Calculate a new view by dividing the old view by 2.
      lNewViewPercentage = (lCurrentViewPercentage / 2)

      ' Check to see if OK to change the percentage. If you apply a view
      ' percentage less then 10, a run-time error results. This code
      ' ensures a valid zoom is assigned.
      If lNewViewPercentage >= MinViewPercent Then

         ' Assign the calculated percentage to the zoom percentage.
         ActiveWindow.View.Zoom = lNewViewPercentage

      Else

         ' If percentage goes out of range set to minimum level.
         ActiveWindow.View.Zoom = MinViewPercent

      End If

      ' See whether a change was made to the zoom percentage.
      If lCurrentViewPercentage = ActiveWindow.View.Zoom Then

         ' No change was made.
         MsgBox "No change was made. Your zoom percentage is already " _
         & "set to the minimum percentage.", vbInformation, _
         "Minumin Already Set"

      Else

         ' A change to the zoom percentage was made.
         ' Option to restore the original zoom percentage.
         lResult = MsgBox("The zoom percentage was changed to " _
                   & ActiveWindow.View.Zoom & "%. " _
                   & "Do you want to restore your original " _
                   & "zoom percentage of " & lCurrentViewPercentage _
                   & "%?", vbYesNo, "Restore Original Percentage")

         ' See whether they clicked the Yes button.
         If lResult = vbYes Then
            ActiveWindow.View.Zoom = lCurrentViewPercentage
         End If

      End If

   End Sub

REFERENCES

For more information about creating Visual Basic for Applications macros, click the Office Assistant in Microsoft PowerPoint, type "how to create a macro," click Search, and then click to view "Create a macro in Visual Basic Editor."

For more information about running Visual Basic for Applications macros, click the Office Assistant in Microsoft PowerPoint, type "how to run a macro," click Search, and then click to view "Run a macro."

NOTE: If the Assistant is hidden, click the Office Assistant button on the Standard toolbar. If the Assistant is not able to answer your query, please see the following article in the Microsoft Knowledge Base:

   ARTICLE-ID: Q176476
   TITLE     : OFF: Office Assistant Not Answering Visual Basic Questions

   ARTICLE-ID: Q163435
   TITLE     : VBA: Programming Resources for Visual Basic for
               Applications