# Visual Structure

This article describes the inner structure and organization of the elements which build the **RadCollapsiblePanel** control.

> caption Figure 1: RadCollapsiblePanel\`s Element Hierarchy

![WinForms RadCollapsiblePanel\`s Element Hierarchy](https://www.telerik.com/products/winforms/documentation/assets/00bdb6ab89a9369650e92959505b26f3/panels-and-labels-collapsible-panel-structure001.png)

> caption Figure 2: RadCollapsiblePanel\`s Structure

![WinForms RadCollapsiblePanel\`s Structure](https://www.telerik.com/products/winforms/documentation/assets/f3b6c8c8978a9ed7b123453db47d96b9/panels-and-labels-collapsible-panel-structure002.png)

1. **RadCollapsiblePanelElement**: Main element of the **RadCollapsiblePanel** control.

2. **CollapsiblePanelHeaderElement**: element responsible for arranging the header of the control.

3. **CollapsiblePanelButtonElement**: Button element responsible for expanding and collapsing the container.

4. **CollapsiblePanelTextElement**: Text element holding the header.

5. **LinePrimitve**: Paints the line part of the header.

6. **CollapsiblePanelLayoutElement**: Layouts the container holding the added controls.

## See Also

* [Design Time](https://www.telerik.com/products/winforms/documentation/controls/panels-and-labels/collapsiblepanel/design-time)
* [Getting Started](https://www.telerik.com/products/winforms/documentation/controls/panels-and-labels/collapsiblepanel/getting-started)