[Overview][Constants][Types][Classes][Procedures and functions][Index] | Reference for unit 'ExtCtrls' (#lcl)

# Reference for unit 'ExtCtrls'

Some extra controls commonly used in Lazarus forms

`uses`
`System,`
`sysutils,`
`types,`
`Classes,`
`LCLStrConsts,` |  | This unit contains all resource strings of the LCL
`LCLType,` |  | This unit is being created specifically for compatibility with Delphi. It should only be used for constants and type definitions that are included in the Delphi Windows unit. This is only done for compatibiltiy.
`LCLProc,` |  | Useful lower level helper functions and classes
`LResources,` |  | This unit maintains and stores all lazarus resources in the global list named LazarusResources and provides methods and types to stream components
`Controls,` |  | This unit contains basic classes for visual controls.
`Forms,` |  | Contains definitions and descriptions for constructing the Forms which are the basis of the Lazarus Graphical User Interface
`StdCtrls,` |  | Several standard controls used in most Lazarus forms
`LMessages,` |  |
`GraphType,` |  | Definitions of several special types (including Raw Image) to be used for graphics
`Graphics,` |  | Unit contains definitions for many fundamental classes and types used in graphic applications
`LCLIntf,` |  | Contains winapi like functions for Delphi compatibility
`CustomTimer,` |  | Contains definition of base class for TTimer
`Themes,` |  | For manipulation of display Themes, mostly in a Windows XP (and later) environment
`LCLClasses,` |  | Defines the base class for all LCL TComponents including controls
`Menus,` |  | Menus to be used in Forms created with the Lazarus IDE
`popupnotifier,` |  |
`ImgList;` |  | Contains definitions for TCustomImageList. base class for TImageList

## Related topics

`Multi-PageControls` |  | Multi-PageControls - controls that offer a selection of alternative pages for display

The latest version of this document can be found at lazarus-ccr.sourceforge.net.