Description: Technology Toolbox: VB.NET Y ou don\'t have to build custom controls from scratch. You can use inheritance to add specialized behavior to existing controls, as this month\'s Desktop Developer column describes ( see Resources ). But you don\'t have to stop there. For advanced control building, you\'ll want to master subclassing. As far back as version 5, Visual Basic supported subclassing to some extent, but VB\'s lack of inheritance meant subclassing involved a lot of extra code. It took...