| 摘要 |
A program design tool comprising a set of predefined class templates to effect different functional utilities in an applications program and said class templates having predefined relationships to other class templates for interaction therewith and each such template being represented visually on a computer screen by an icon, a workarea to provide a substrate for building an applications program, a pointing device to enable a user to select, to pick up, to drag and to drop icons from one place to another on a computer screen workplace containing the workarea, in which the class templates include a data class, a query function class, a form class, a function class, a graphics class, a data container class, a static container class, a data file class and database class.
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