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Will it be difficult ? The program is written in C.

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closed as not a real question by sblair, slhck, Nifle, random Oct 7 '11 at 2:28

It's difficult to tell what is being asked here. This question is ambiguous, vague, incomplete, overly broad, or rhetorical and cannot be reasonably answered in its current form. For help clarifying this question so that it can be reopened, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

Save a backup copy of the project (just in case), then just open it in Visual Studio 2008. The upgrade will run automatically. Usually, there aren't any major problems, though it depends on your code. If there are problems, you will be able to see the upgrade log. Then, build your program to check if there were any errors introduced. If not, then run it and test it.

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