As you are looking for the Registration process of CS Foundation Programme, so here I am giving you directions for same

Go to the official site of ICSI
At the left vertical bar of page click on “Students”
Now new page will open
At this page click on “New Registration for Foundation/Executive Programme” which is on left vertical bar of this page
Registration section will open which look likes below image



Under this section, read all the details and click on “proceed to registration”

Registration form will open which look likes below image



Fill all the detail at provided place and click on “Register” Button