An application program for use in a hybrid computing environment comprising standalone, client-server, or Internet use is described. The application is written in a single code base and installed on a client computer that is configured for use as either a standalone or networked computer. Server side components of the application program are installed on a server computer configured to be coupled to client computers over a local or wide area network or over the Internet. Data and file resources utilized by the application program are installed locally on the client computer or on the server computer, or on a device remotely coupled to the network coupling the client and server computers. The application program is installed on the client computer for use as a standalone, client-server, or Internet application, or any combination thereof. At runtime, the user selects the mode of use in which the application program is to be executed.