Calling HFT methods

Hello,

I want to import an existing HFTs and invoke the HFT functions in my own plugin.

How do I know or how can I get existing HFTs and its functions so that I can call/invoke the proper function in my own plugin?

I am using:

Acrobat DC Pro Classic(Acrobat2015)

Acrobat DC SDK

OS: Windows 7

Thanks,

Best Regards,

Navnath.