US Patent 7861310 Runtime modification of client user controls

Methods and apparatus, including computer program products, for modifying a user interface of a client application. A method includes rendering a graphical user interface of a client application having a first and second control coupled to the client application, receiving user-generated input characterizing a request to modify the first control and a selection of a third control; exchanging the first control with the third control; rendering the graphical user interface of the client application as having the third control in lieu of the first control; receiving user-generated input characterizing interaction with the second control; and rendering the third control to reflect the interaction with the second control.