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IE9 browser control causes C Runtime functions to sometimes fail??

Last Modified: 2012-05-11
We have an MFC application that uses a CHTMLView and also in a separate view references an activex control (Parallelgraphics Cortona Vrml Viewer v4.2).

A bizarre issue occurs on a system that has updated to IE9. Somehow when in the HTMLView upon right-clicking the view and hitting one of the context menu options it causes the C run-time math functions to then return incorrect values - which obviously leads to issues within our software and also apparently in the loaded 3d viewer. This is software that has worked correctly for years - it's quite bizarre.

Calls to functions such as tan() return incorrect values after right-clicking in the browser control. Any insight?

This is an application that has been built in MSVC++ 6.0.
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Director - Software Engineering
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James MurrellQA Product Specialist

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