pt 

AssignTo (TPngBackgroundColorFormat3)

pt 

GetChunkSize (TCustomPngBackgroundColor)

pt 

GetChunkSize (TPngBackgroundColorFormat3)

LoadFromStream (TCustomPngBackgroundColor)

LoadFromStream (TPngBackgroundColorFormat3)

SaveToStream (TCustomPngBackgroundColor)

SaveToStream (TPngBackgroundColorFormat3)