Delphi This Is The DelphiVCL.Application.HelpSystem Property

[FireWind]

This Is The DelphiVCL.Application.HelpSystem Property
By Muhammad Azizul Hakim August 25, 2021

HelpSystem or DelphiVCL.Application.HelpSystem property provides access to the interface for working with the Help system.

TApplication uses IHelpSystem to interact with a Help system manager. This interface includes methods for displaying Help topics based on a keyword or topic ID.

Applications can use the HelpSystem property to interact directly with the Help system manager, or they can use the application’s Help-oriented methods such as HelpCommand and HelpJump.

How to use DelphiVCL.Application.HelpSystem properly?​

In order for the Help to work properly, insert in the uses clause of your application the Vcl.HtmlHelpViewer or another unit that provides an interface to the external Help viewer to use. The Vcl.HtmlHelpViewer unit provides a Delphi interface to the HTMLHelp Windows native Help handling function. For C++, you need to include the HTMLHelpViewer.hpp header files.

For information about the native Help handling functions (HTMLHelp or other) and about the data passed to them, see the appropriate HTMLHelp topics in the MSDN Library.

How to browse the properties, methods, and built-in properties of the DelphiVCL.Application.HelpSystem?​

Let’s browse all the properties, methods, and built-in properties of the DelphiVCL.Application.HelpSystem using dir() command:

import DelphiVCL
 
dir(DelphiVCL.Application.HelpSystem)

See the responses in our Windows command prompt​

You can also read short information about the DelphiVCL.Application.HelpSystem using the print() command:

print(DelphiVCL.Application.HelpSystem)

See the responses in our Windows command prompt: