I have a project that generates text (representing an interface and a class) based on metadata. I would like to take this generated code and insert it as a new class and interface directly into the currently opened solution under a specific project and directory. I will create the menu tool that will generate the class but what I don't know how to do is gain access to the following items from within my custom Visual Studio Extension:

1. Iterate the current solution and find a project to dump the generated code into.
2. Open a new file window within Visual Studio and inject the generated text that comes from my tool directly into that window.
3. Create a new folder in a specific project within the current solution from within my custom extension.

EDIT - To clarify I need to open a new file (e.g. Right Click on a Project -> Add - > New Class) and insert text into it from within my custom Visual Studio Extension.

Thanks