Here's a screenshot showing a typical VC project:-

Name:  Capture-20.png
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Notice that the various .cpp files are arranged into folders (called 'Filters') with each of them containing one or more .cpp files- BUT....

If I open some other VS solution and load up that particular project, all the various filters get forgotten - i.e. all my .cpp files end up in a long line, with all the filter folders gone. Is there any way to retain the filters when moving a project from one sln file to another?