How to handle System.Windows.Forms.UserControl close event?

I am working for a Visual Studio extensibility menu Project. I have a User control Window (System.Windows.Forms.UserControl).

This window will open from a custom Menu-item in Tools menu on VS Ide .

I need to handle the window close event whenever I close the window using close button on the right side top corner close(cross) button.

How to achieve the closing event handling please guide?

For reference I am Adding the Image.

Ashutosh Chaturvedi