Specifying Property Categories

When you register properties in a category, you can use any string you want as the name of the category. If you use a string that has not been used before, the Object Inspector generates a new property category class with that name. You can also, however, register properties into one of the categories that are built-in. The built-in property categories are described in the following table:

Property categories

Category	Purpose
Action	Properties related to runtime actions; the Enabled and Hint properties of TEdit are in this category.
Database	Properties related to database operations; the DatabaseName and SQL properties of TQuery are in this category.
Drag, Drop, and Docking	Properties related to drag-and-drop and docking operations; the DragCursor and DragKind properties of TImage are in this category.
Help and Hints	Properties related to using online Help or hints; the HelpContext and Hint properties of TMemo are in this category.
Layout	Properties related to the visual display of a control at design-time; the Top and Left properties of TDBEdit are in this category.
Legacy	Properties related to obsolete operations; the Ctl3D and ParentCtl3D properties of TComboBox are in this category.
Linkage	Properties related to associating or linking one component to another; the DataSet property of TDataSource is in this category.
Locale	Properties related to international locales; the BiDiMode and ParentBiDiMode properties of TMainMenu are in this category.
Localizable	Properties that may require modification in localized versions of an application. Many string properties (such as Caption) are in this category, as are properties that determine the size and position of controls.
Visual	Properties related to the visual display of a control at runtime; the Align and Visible properties of TScrollBox are in this category.
Input	Properties related to the input of data (need not be related to database operations); the Enabled and ReadOnly properties of TEdit are in this category.
Miscellaneous	Properties that do not fit a category or do not need to be categorized (and properties not explicitly registered to a specific category); the AllowAllUp and Name properties of TSpeedButton are in this category.

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