How to show which function I am in at the top of the editor ?

Hello Shereef,
 
Thank you for contacting JetBrains Support. I'm glad to work with you on this ticket. 
 
Yes, we provide a similar feature, called Sticky lines. It maintains the visibility of parent elements as you scroll through the file, like below:

Let me know if it fulfills your requirments. 

Tom Luo How do I get it to work for VB?

it works fine in C# but not VB

Hello Shereed, 

Thanks for the update. I have successfully reproduced the issue at my end, and have created an issue tracking this: RIDER-123383 Sticky Lines not working for VB 

Please upvote it to indicate your interest and subscribe to further status updates.

Let me know if there is anything else I could help you with. Have a great day!

Regards,

Tom