PPT97: Sample VB Code to Obtain Window Handle

• Microsoft PowerPoint 97 for Windows

SUMMARY

This article provides a sample Microsoft Visual Basic for Applications macro that uses the FindWindow API to obtain a window handle to the main PowerPoint window.

A window handle is important if you plan to call Windows API procedures in your code. Many Windows API procedures require a window handle as one of the parameters.

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

   Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" _
      (ByVal lpClassName As String, ByVal lpWindowName As Long) As Long

   Sub GetWindowHandle()

      Dim hwnd As Long
   
      ' Call the FindWindow API; this API returns a window handle.
      hwnd = FindWindow("PP97FrameClass", 0&)
 
      ' Check if you were able to obtain the Window handle.
      If hwnd <> 0 Then
         ' If hwnd not zero a window handle was obtained.
         MsgBox "Successfully obtained Window Handle (HWND) for " _
            & "PowerPoint.", vbInformation, "Got Handle"
      Else
         MsgBox "Could not obtain Window Handle (HWND) for PowerPoint.", _
            vbInformation, "Failed To Get Handle"
      End If
 
   End Sub

REFERENCES

For additional information about getting help with Visual Basic for Applications, please see the following article in the Microsoft Knowledge Base:

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