I want to create a simple IDE Expert for Delphi 7, like in the following image:
I've verified the links gave for this question but OTA Api newsgroup is dead, and most of the documentation is unavailable (broken links). Can someone give a starting point with this?
This is not an easy task, trying to create your own Expert. It takes some extensive knowledge of the delphi open Tools api (toolsapi.pas) \
Some good places to start to learn how to create an expert and/or use of the open tools api
http://www.davidghoyle.co.uk/WordPress/?p=11
http://www.gexperts.org/otafaq.html
http://www.gexperts.org/otafaq.html#sample
http://www.gexperts.org/otafaq.html#projectgroup
http://www.gexperts.org/otafaq.html#resource
There is lots more to be found with a google search of Delphi 7 + Open Tools API
Good Luck!
The image you provided is for CnPack IDE expert. It is an open-source tool. You can download its source code from the link below, and study it:
http://code.google.com/p/cnpack/downloads/list
BTW, AFAIK Galileo is project codename for Delphi 8 and newer IDE versions, not Delphi 7.