Phantom Process With Remote VB6 Dll

Jun 21, 2008

I remoted most of my number crunching stuff to a dll.

It work fine except for a few strange things that I observed like from time to time a strange message "Error in loading DLL" even though everything works fine. This message appears only when entering the main formula in the formula, and is no problem at all in usual work.

When I investigated, I noticed in the "windows task manager" that one instance of excel remains open even after I have closed excel. This phantom excel process is maybe related to the other problem I explained above.

Instead of calling a VBA function, it creates a VB6 object from this dll and uses the methods of this object. In this way I have remoted the number crunching functionality.

The main parameter passe in this process is a reference to the original workbook. I need it because the number crunching functions need to read data from the workbook.

I made it sure to terminate the life of the object properly on both sides by ad hoc obj=Nothing statements.

Still I think that the "garbage collection" or the "terminating" is the cause of the problem.

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