in windowblinds there's only a simple 32bit tga support to include these images in wbskins. i wanted to search other possibilities to find an app how to get per-pixel alpha blending support on windows but it's a hard way.
here you can find some example applications and source codes how to use per-pixel alpha blending in a project. just download the zips and run the exe files. it's amazing, it's so smooth, so icandy.
i don't really know why i opened this topic but maybe we'll meet a brand new skinning app that will be able to get per-pixel alpha blending.
how does it look? just an example:

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