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I am trying to get an integrated mapping
application working with Mapinfo 7.8 and VB.NET2005. I have created similar
applications before with VB6 and MapInfo but I have been unable to get the
callback function working with vb.NET. I have created a standard Windows project
and a class containing the methods by which MapInfo notifies the calling
program. In the main form I create a public instance of the class and call
MapInfo's SetCallBack method with the instance as the argument. Although I can
quite happily control MapInfo from the VB.NET program I get no response at all
from actions in the MapInfo window. I have tried to implement some of the ideas
that have appeared in MI-L but with no success. I know I am not the
only one with this problem. Does anyone know of any rules/steps that will
lead to a successful implementation of the callback function? I find it hard to
believe that MapInfo would provide this method without some clear-cut way of
implementing it. Any advice would be appreciated.
David Hebblethwaite
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