Main concepts

The interface of the application is made by components which one the user selects from the Palette of components and places on the form, components are some kind of building blocks. When you construct the interface of application the principle WYSIWYG («What You See Is What You Get») operates, and at creation of the application the user sees the form almost the same as well as at its execution.

The components are the structural units and are divided onto visual (visible) and not visual (system).

For creating the interface of applications the set of visual and not visual components is offered that are located on bookmarks Common, Data access, Data control, Service.

On Common bookmark of the components palette there are the following visual components: Text, Shape, Page control, Image, Group box, Panel, Bevel, Splitter.

On Data access bookmark of the components palette there are the not visual components which serve for organization of access to data contained in the tables. They represent an intermediate between the data of database tables and visual components: ADO Connection, ADO Table, ADO Query, Parameterized query, dBase Table.

On Data control bookmark of the components palette there are the visual components which are used for creating the interface part of the application. With their help, the user can perform such operations with database tables, as viewing or editing the data.

Let's consider the following visual components: DB edit, DB memo, DB image, DB text, DB check box, Lookup combo-box - classifier, Lookup list - classifier, DB index combo-box, DB grid, DB control grid, DB Navigator, DB work-panel, DB chart, Calculator, Operator combo-box, DB Date/time picker, DB mask edit, Date/time picker, Mask edit, Check box.

On the Service bookmark of the components palette there are the components Save query into table, Work-panel and Action List.