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

# THTMLBrowserHelpViewer.BrowserParams

Parameters passed to the browser application to display a HTML help topic.

## Declaration

Source position: lazhelphtml.pas line 112

`published property THTMLBrowserHelpViewer.BrowserParams : string read FBrowserParams write SetBrowserParams;`

## Description

BrowserParams is a String property used to specify arguments passed on the command line to the browser application. The arguments identify the URL and any optional command line switches needed for the executable in BrowserPath. BrowserParams uses the '%s' notation to represent a macro that is substituted with the URL for the Help topic when it is displayed. The value in BrowserParams can be overridden, but should always include '%s' to allow insertion of the URL for the help topic.

BrowserParams is updated/used when the HTML help topic is displayed in the ShowNode method. When BrowserParams contains an empty string (''), the value in DefaultBrowserParams is used.

Use BrowserPath to access the browser application used to view HTML help topics. Use the OnFindDefaultBrowser event handler to perform conditional browser path and parameter assignment based on user-defined criteria.

## See also

THTMLBrowserHelpViewer.BrowserPath |  | Path to the browser application used to view a HTML help topic.
THTMLBrowserHelpViewer.BrowserParams |  | Parameters passed to the browser application to display a HTML help topic.
THTMLBrowserHelpViewer.OnFindDefaultBrowser |  | Event handler signalled to find the default browser for the help viewer.
THTMLBrowserHelpViewer.ShowNode |  | Displays the help node for a HTML help topic.