Use the Component Palette to add controls to your custom forms. The palette contains a number of buttons, each representing a type of control that you can use, grouped by tab.

Use the Component palette with the Form designer of the active form. Click a button in the palette to select the component type. Then click the active form to set the Form designer to insert mode and to add the control concerned to the form. If it concerns a visual component, you can directly set the correct dimensions of the control. Click the white arrow too the left of the Component palette to return to Select mode.