System.HelpIntfs.IExtendedHelpViewer.DisplayHelpByContext
Delphi
procedure DisplayHelpByContext(const ContextID: THelpContext;
const HelpFileName: string);
C++
virtual void __fastcall DisplayHelpByContext(const System::Classes::THelpContext ContextID, const System::UnicodeString HelpFileName) = 0 ;
Properties
Type | Visibility | Source | Unit | Parent |
---|---|---|---|---|
procedure function |
public | System.HelpIntfs.pas System.HelpIntfs.hpp |
System.HelpIntfs | IExtendedHelpViewer |
Description
Displays the Help topic specified by the numeric context identifier.
The Help System calls DisplayHelpByContext to handle a context-based Help request:
ContextID
is the Help topic's numeric context ID. In case of a .chm help file, you must map symbolic context IDs of Help topics to numeric IDs in the[MAP]
section of your project (.hhp) file.HelpFileName
is the name of the file containing the topic. Note that some Help engines require the file name to be fully qualified.
In order to use DisplayHelpByContext, 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. For C++, you need to include the HTMLHelpViewer.hpp header file.