You might have a look on the VST source code archive or ask one of the maintainers of the site.
http://www.u-he.com/vstsource/
on 2/25/03 12:44 PM, Josh Steiner at joschi@eds.org wrote:
hey all, i'm trying to help thomas grill debug the *awsome* [vst~] object so that i can work with the fruity loops VSTi ... does anyone know any open source/free software VST hosts? I'd like to test the fruity vsti with another host to see if we can peg down these bugs. i found one called "VST Host" but it does not support the graphical interface of the plugins, which is what i'm testing.
thanks.
-josh