Graphviz as a library, Visual Studio C++

I need to use Grahviz as a libirary in Visual Studio C++ project. I've added a path of lib and include folder in project properties, and I've included gvc.h file in my c++ project.

And I have error:

Error layout type: "dot" not recognized. Use of one
What else I need to do?

PS: Sorry for my english :)

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