PNG unit

Hi

I am keen to find a unit/class/component that will allow me to use a
32 bit PNG graphic and use the alpha channel properly (8 of the 32 bits).
That is, true alpha blending of a TImage on the canvus.

Have looked at PNG Lib but can't seem to get proper alpha blending.
Have also looked at GraphicEx, good unit, but no blending.

Have settled on PNG for its compactness, quality & alpha information.

Can someone please point me in the right direction.

Cheers

Steve Wright
Pro-Motion