Too many controls in Visual Studio Toolbox sometimes create confusion and you need to search through the entire toolbox to find out particular controls. Though controls are categorized with different sections, still sometimes you need to search entire list of control to get the correct one. Visual Studio 2011 enables search with in the tool box to avoid this complexity.
In Visual Studio 2011 Developer Preview, you will find one search box with in Toolbox control. Type the control name which you required, Visual Studio will automatically filter the control with matched name.
Let’s say you have type “Button”. Toolbox will automatically filter only button controls as shown in below images.
Clear the search field value, toolbox will restore all the controls
Hope this helps !