Hi Jason,
Thanks for your interest in syncfusion products.
Currently there is no support for autocomplete for "this" when typing 't'. When we type a '.' we can display a set of keywords using the context choicee and context prompt which is done using the lexem config file which is a part of Intellisense support.
Please have the sample for Intellisense using lexem.
sample: http://www.syncfusion.com/downloads/Support/DirectTrac/105401/Context Choice and Prompt2005106785.zip
Please have the documentation from the below link
Documentation: http://help.syncfusion.com/ug/windows%20forms/edit/default.htm#!Documents/contextchoice.htm
Please let us know if you have any concerns.
Regards,
Paul Anderson S