Delphi: 32-bit image does not display correctly on Glass Form -

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i have png (32-bit) image in timage. form has glass frame. picture's background black, not transparent. how fix it?

delphi 2010.

thanks.

as workaround can change bits of png image 32.

check sample

the left image png of 8 bits , other of 32 bits.

enter image description here


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