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#38: How can I add a flat/hot track effect for your components

If you want to add a useful feature to your component (like URL in html or PageControl/TabControl.HotTrack) you must handle the CM_MOUSEENTER and CM_MOUSELEAVE messages:

type
  TyourControl = class(TDescControl)
  private
    { Private declarations }
    FLinkFont: TFont;
    FPassiveFont: TFont;

    procedure CMMouseEnter(var Msg: TMessage); message CM_MOUSEENTER;
    procedure CMMouseLeave(var Msg: TMessage); message CM_MOUSELEAVE;
  end;

implementation

procedure TyourControl.CMMouseEnter(var Msg: TMessage);
begin
 //Change color when mouse is over control
 Font.Assign(FLinkFont);
end;

procedure TyourControl.CMMouseLeave(var Msg: TMessage);
begin
 //Change color when mouse leaves control
 Font.Assign(FPassiveFont);
end;

As example, you can view a sources of the TURLLabel and/or THighLightLabel components on our site.

Published: November 4, 1999

See also

	Paradox Viewer
	Paradox to Text converter
	Paradox Password Recovery
	DBExport tools
	DBISAM Password Recovery
	SMImport suite
	Paradox ActiveX
	Mail parser (ActiveX)
	ABA Document Convert
	ExcelFile Viewer

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