http://files.solidworks.com/API/Downloads/00000/0300s/0364/api_sdk.zip
http://www.personal.psu.edu/jah5420/Misc/SolidWorks/SolidWorks%20API%20SDK/SolidWorks%202008%20API%20SDK.msi
http://www.angelsix.com/cms/features/tutorials/64-solidworks/67-creating-a-solidworks-add-in-from-scratch?fontstyle=f-smaller