How can you perform an action every frame, or when the Windows Forms window is resized?

Question

C++ / C#

For example, I want to make a notepad and all the time I should have the entire field filled with textbox, how can I make it so that the textbox size = window size all the time without clicking on the buttons?

Answer 1

subscribe to window resize event

Answer 2

Set the Dock property to Fill or anchor the textbox with the Anchor property