Display modal on login screen of Credential Provider

I want to display modal after clicking the logon button like the screen below. I'm trying to communicate with a server with a timer in modal, is it possible? Thanks in advance.

Yes it is possible To show a pop-up like that,

1. make a simple standalone C# form program (.exe) to handle that Modal.
2. Later I put the exe file somewhere else inside the pc.
3. Later I use system((string)L"path-to-exe-file") command to run that exe file