原文标题：How to use transparent PNG icons with Delphi ImageList
原文：http://www.aha-soft.com/faq/delphi-imagelist-png.htm
Query: "Embarcadero Delphi ImageList does not show transparent PNG icons correctly. How to fix it?".
Solution: If you want to use 32-bit (24-bit + alpha channel) PNG icons within Delphi TImageList, you need to set the following property values for TImageList.
DrawingStyle: dsTransparent
ColorDepth: cd32Bit