Just define the following dll cdecl functions :
plugininit : your init sub
startpluginmain : start your gui window edit
closepluginmain : called to close the gui window edit
mypluginproc : called as sample=mypluginproc(sample) in the audio loop
myecho.dll / my3band.dll / my4echo.dll / mybaxandall.dll / peekenhancer.dll with code source are provided as example (freebasic) .
the dlls can be easily written in freebasic or any dll compatible language (c++,VBasic,...),giving you easy access to high level programming facilities (file access,gui windows,graghics) without needing special knowledge of the VST sdk (c++).
(01/02/2013) peekenhancer, baxandall low/high eq added