Xceed SmartUI

Xceed SmartUI allows VB6 developers to build rich, reusable Office 2000 or Office XP style user interfaces.

It not only includes all the latest UI controls you need, but also provides an extraordinarily modular and versatile framework for quickly and easily creating your own controls either visually with its WYSIWYG designer, or by code.
Xceed SmartUI offers an incredible amount of flexibility over the look and feel of its controls or the controls created with it. Through the use of a rock-solid, windowless and lightweight core control, user interfaces built with Xceed SmartUI end up very fast, glitch-free and use minimal resources.

These and many other unique and "developer-friendly" features make Xceed SmartUI the absolute essential tool for user interface development. Find out more about some of its controls:
MenuBars and popups
ToolBars
Treeviews
OutlookBars
StatusBars
PropertyLists
PropertyToolBoxes
Smart ListBoxes
OptionLists
TabStrips
MS Coolbar integration
Win2K summary list
FrontPage Viewbar