The following example shows how to determine if an object has a property available, and if so, how to change the property:

function HasProperty(Obj : TObject; Prop : string) : PPropInfo; begin Result := GetPropInfo(Obj.ClassInfo, Prop); end;

procedure TForm .Button Click(Sender: TObject); var p : pointer; begin p := HasProperty(Button , 'Color'); if p <> nil then SetOrdProp(Button , p, clRed) else ShowMessage('Button has no color property');

p := HasProperty(Label , 'Color'); if p <> nil then SetOrdProp(Label , p, clRed) else ShowMessage('Label has no color property');

p := HasProperty(Label .Font, 'Color'); if p <> nil then SetOrdProp(Label .Font.Color, p, clBlue) else ShowMessage('Label.Font has no color property'); end;

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