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Also: You might want to change the BorderStyle, which you can set to Fixed3D to make the Panel look like the example screenshot.
And: When the controls are inside the Panel, they will be affected by the Enabled property of the Panel and the Visible property.
Note: In the example, we added two Button controls to the inside of the Panel control.
Review: As you may know from other controls, FixedSingle is a single dark line while the Fixed3D style is an inset, shaded border.
And: Instead of dealing with many text boxes or buttons separately, you can change many controls' states at once with the Panel this way.
And: With its ability to affect the state of all its enclosed controls, you can reduce your program's logical complexity.