RAD Studio
Developing Applications with VCL Components

The Visual Component Library (VCL) is a set of visual components for the rapid development of Windows applications in the Delphi language.  

VCL contains a wide variety of visual, non-visual, and utility classes for tasks such as building Windows applications, web applications, database applications, and console applications.

This section introduces:
  • VCL Architecture
  • VCL Components
  • Working With Components
Some VCL components are specific to an operating system (such as Vista) and thus will not work on other operating systems. For example, the design time components TFileOpenDialog and TFileSaveDialog are specific to Vista. Some components are designed to work with themes either enabled or disabled. (To enable or disable themes, check or uncheck the Enable runtime themes box on the ProjectOptionsApplication dialog box.)
In the following table, note that Windows Server 2003 is treated as Windows XP, and Windows Server 2008 is treated as Vista.
Components Available Only for Certain Operating Systems  
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