Q:  Is there an easy way to assign speedbutton properties via iteration at runtime? (The Speedbutton properties in my application are very dynamic.)   That is I don't want to have to do the following for every speedbutton property that changes:

 Toolbar.Speedbutton1.Glyph := GetGlyph(1);
 Toolbar.Speedbutton2.Glyph := GetGlyph(2);

 But rather something that like

For I := 1 to NumSpeedButtons do
  Toolbar.Speedbutton[I].Glyph := GetGlyph(I);

A:  This code fragment might put you on the right track.  It iterates through all the components on the form.  I suppose you could use the Tag property to control which Glyph is which in your GetGlyph function.

 for I := 0 to ComponentCount-1 do
 if Components[I] is TSpeedbutton then
   TSpeedButton(Components[I]).Glyph := GetGlyph();

Another option is to build your own array just for SpeedButtons (much like TForm builds it for all components).