How to Detect Right Click on the Taskbar

I've got a Windows Forms applicat开发者_JS百科ion in C# that starts off with a loading dialog. As expected, a button for the app shows up in the Windows taskbar.

I would like to detect right-clicks that might be done to that button.

Ultimately, I hope to disable the right-click or simply have the loading dialog regain focus. I've seen that some people use custom libraries and packages (interop, for example) to achieve some Win32 functionality, but I'd personally like to avoid this. Is it impossible to do without such libraries/packages?

How about just not showing the form in the taskbar by setting Form.ShowInTaskbar to false?