Can anyone inform me "HOW TO MAKE MACRO FOR FILE CUSTOM PROPERTIES"
That depends on what kind of macro you want to write for custom properties.
To begin with start reading through this blog article on Solid Edge File Properties.
Also if you search through various QA on the Solid Edge Developer Forum which is dedicated for programming related queries, you can find answers to several of your custom properties related queries.
Else you can always post a new message in the Developer forum.
I am currently working on one.If you are interested in this macro, please send me a pvt message.