Just another C# Collapsing Group Control http://www.codeproject.com/cs/miscctrl/xpgroupbox.asp XP Style Collapsible GroupBox http://www.codeproject.com/cs/miscctrl/XPCollapsGroupBox.asp Collapsible Panel http://www.codeproject.com/cs/miscctrl/SlidingPane.asp Collapsible Splitter control in C# http://www.codeproject.com/cs/miscctrl/collapsiblesplitter.asp