in my Panel, i have " TSpeedButton. There are no Tab Order property to order this 3 speed button.
How can organize speed button on my panel?
TSpeedButton derives from TGraphicControl and so does not accept input focus. This is why there is no TabOrder property.
If you wish your buttons to be able to receive input focus then you need to use a different button class. For example, TButton or TBitBtn.