Hello whiteliondd6
Ok I was checking your issue and I recommend you using touch_sensing demo and modify it according to your requirements.
In other way you may add the touch sensing library from the SDK source directory.
To do that you need to click right in your folder project and selected import. General/File System then go to the SDK dir. and select the folder you needed.
Make sure you add the paths in Properties/C-C++ Build/Settings/Tool Settings/Includes.
I suggest you check the example properties as reference.
Best regards
Pavel_Hernandez