Develop Polished Web Form Controls the Easy Way with the .NET FrameworkPre-built custom controls make application design easier and faster and allow you to maintain UI consistency. However, prepackaged controls can be big and slow, and are OS-specific. For those who don't want to use prepackaged controls, Visual Studio .NET provides controls for Web Forms similar to those found in Windows Forms, including label and textbox, and new additions such as the DataGrid, all of which you can customize.