The BrowseType property specifies what the item displays, when the user clicks/browses it.  The BrowseCustomType property indicates the custom object to be shown when the user clicks/browses the item ( child, radial-slider or gauge ). The BrowseCustom property gets or sets a value for specified property, when browsing custom control. The following properties determine the position / size of the custom section of the control:

• CustomLeft property, gets a value that represents the distance between the left side of the inner custom control and the left side of the control itself
• CustomTop property, gets a value that represents the distance between the left side of the inner custom control and the left side of the control itself
• CustomWidth property, gets a value that represents the width of the inner custom control
• CustomHeight property, gets a value that represents the height of the inner custom control

The following screen show shows the custom-section of the control: