Although no longer needed with Visual Basic version 5 because of AddressOf, 
the callback server in this directory can be used to emulate AddressOf 
in Visual Basic version 4 and in Office 97.  The server is described in 
CallBack.Doc.

If you've used this server previously in VB4 and wish to port your 
project to VB5, please overwrite the old VBBrk32.Dll in your system 
directory with the new file.  If you use this in Office 97 for subclassing, 
you should also distribute the VBBrk32.Dll with CBack32.Dll to avoid 
break mode problems.