“ How to pass an parameter to page while opening ? Please guide. “
Easiest way to get started with this is have Mendix do this for you, either of these two ways:
Now check out Course_Overview, see what the Edit-button does and notice that page Course_NewEdit contains a datagrid with, as datasource, an object of entity-type Course.
Also use this option to override the page title, so you can make the title different per clicked button: