Trigger to paint a component after color change

Or do a component.invalidate + component.refresh

Maybe you should change the code to repaint the Button once its colour changed by simply calling Paint. You could also add it as a last line into SetOrdValue();

Thanks for the replies.  I really need to know where to put the code to trigger the painting after the color has been changed.  Whatever I add as a line after SetOrdValue throws an error saying "Undeclared Identifier Paint" or "Undeclared Identifier Invalidate" etc when I try to compile the unit.

If your custom control is based on a windowed control, you can try this.
In your uses in the beginning of the unit, add 'Windows'
In your MyInplaceEdit.Edit
   begin
      SetOrdValue(ColorDialog.Color);
      InvalidateRect(TColorButton.Handle, nil, False);
   end;

//Have yot tried - as suggested by others, but specifying that you want *TButton* to repaint:
SetOrdValue(ColorDialog.Color);
TColorButton.Invalidate;

"Undeclared Identifier Paint", huh? Where did you place your Paint()? It should not be private (protected?) to allow you to use it. Maybe it will help

Thanks for the latest replies, but it's still not working.  I have discovered that if i remove the line "inherited Paint" from the Paint procedure the button disappears from the form.  On single-stepping through the code it definitely goes through the whole Paint procedure, so why will it not paint the button?  

ON and TName:  When I add InvalidateRect(TColorButton.Handle, nil, False); I get the error "Undeclared Identifier 'Handle'"

LukA YJK:  I have tried putting Paint in all the sections but it will not work.

What class are your custom control based on?

Yeah, better post your TColorButton class declaration. You have an inherited Paint, but calling your new Paint raises Exception. This is suspicious :)

Thanks ON and Luka YJKOK - here's the declaration:

type
  MyInplaceEdit = class(TColorProperty)
  public
    procedure Edit;
    function GetAttributes: TPropertyAttributes;
  end ;

type
  TColorButton = class(TSpeedButton)
  private
    { Private declarations }
    FMyInplaceColor: TColor;
  protected
    { Protected declarations }
    procedure Paint; override;
  public
    { Public declarations }
  published
    { Published declarations }
    property Color: TColor read FMyInplaceColor write FMyInplaceColor;
  end;

procedure Register;

implementation

and try this in your MyInplaceEdit.Edit;

{...}
SetOrdValue(ColorDialog.Color);
      TSpeedButton(TColorButton).Invalidate;

Thanks TName - we're almost there!  The color will change now, but only if I "do something" like resize it or toggle between the form and the code window.

Try this:

SetOrdValue(ColorDialog.Color);
TSpeedButton(TColorButton).Invalidate;
Modified;

 (If it works, try it without the invalidate line - you shouldn't really need invalidate)

Sorry TName - it doesn't work.