How to use the GroupBox Control

Drag and drop GroupBox control from the toolbox on the window Form. When you drag and drop the group box, it has a border by default,

and its caption is set to the name of the control. You can change its caption.

GroupBox is a container of other control.

GroupBox properties

AutoSize:  Gets or sets a value that indicates whether the GroupBox resizes based on its contents.

BackColor: Gets or sets the background color for the control. 

ForeColor: Change ForeColor of all control inside GroupBox

You can change ForeColor of all control inside GroupBox at a time.

The code should be written inside Form Load so that when Form run than code (for changing ForeColor) will be executed.

For example:

Private Sub Form24_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
         'Change Fore color of all control in side GroupBox
         GroupBox1.ForeColor = Color.Blue
 End Sub

Fore color of all control inside GroupBox will be change When Application run.

Output: