Hi @quoc, yes you can include the binary DLL’s directly in your project.
As stated in the SDK licence agreement @ http://developer.tobii.com/?wpdmdl=203
“2.1 Subject to Section 2.2 and Section 6, You are hereby granted a limited, nonexclusive, non-transferable, revocable, license:
… ii) to distribute any binary files in the Licensed Software, or the binary form of example source code in the Licensed Software, only as part of Software developed by You, and”
Please do let us know if we can provide any further information. Best Wishes.