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**UpdateThumbFixed, PROTECTED**

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The **UpdateThumbFixed **method positions the scrollbar fixed thumb and enables or disables the vertical scroll bar depending on the number of items in the browse list, the currently selected item, and the active step distribution method. See //Control Templates--BrowseBox// for more information on fixed thumb behavior.

**Implementation:**

The AddSortOrder method sets the step distribution methods for the BrowseClass object.

**Example:**

**MyBrowseClass.UpdateThumb PROCEDURE**

** CODE**

** IF SELF.Sort.Thumb &= NULL  !if no step object**

**  SELF.UpdateThumbFixed      !reposition thumb as tho fixed**

** ELSE**

**                             !reposition thumb per step object**

** END**