A Group box visually organizes a collection of controls as a group. When you select Group box in Resource Editor, you create an expanding (or shrinking) box around the controls you want to group and give the group a title. You can add a hotkey to your group title with an ampersand (&). For example, consider the following group title:
This causes the "T" to be underlined in the title and makes it a hotkey. When the user presses the key combination ALT+T, the focus of the dialog box shifts to the next control after the Group box in the tab order. This control should be a control in the group. (You can view and change the tab order from the Format>Tab Order menu option in the Resource Editor.)
Disabling the Group box disables the hotkey, but does not disable any of the controls within the group. As a matter of style, you should generally disable the controls in a group when you disable the Group box.