how create a vb2012 library with one function that calls a calendar... be able to call from vfp9

Hi Experts,
We need créate a library in vb 2012 with just one function, to use the calendar control.

The library will be called from a legacy application in vfp9,
its enough just to save the selected date in a text file.

Then after the control closes the legacy app can read the text file...
Please if you have an example on how to créate and use a library in visual basic 2012
Please your help.....
RGuillermoProject ManagerAsked:
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To create a class library in VB.NET, you need to create a new project in VS and select the Class Library template. This will add a class file in your project. You can then add a method to this class as needed.

You may have to make the DLL COM visible to make it usable in VFP.

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