VS 2019 Check If Server Online

Hi I am trying to create a small example where I have a server form and a client form. On the server form I will enter my public ip4 address in textbox 1 and in textbox 2 I will enter the port that the client will need to connect to. Then I will have a start server button where the server form starts listening for any clients. On the client form for now I only want to have a Check If Server Online command button that obviously check if the server is online/available. When clicked it will check if online and then either popup a msgbox if Online/Offline or display Online/Offline Status in a label etc..

I need help with both forms/sections:

Start Listening For Server
Check If Server Online/Offline


~Thanks