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GiorgioSfiligoi-6452 asked JiaYou-MSFT commented

FILE ASSOCIATION & ICON

I have certain custom data files for which I use the extension .gmy.
I associated this extension to an icon file named GMY.ico (created with VS 19); this contains icons for all the required formats, namely: 16x16, 32x32, 64x64, 48x48, 64x64, 96x96 - all 8 bit.

The association works fine as long as I use View | Medium size or Small size in File Explorer; when I select Large size, the icons show the same as for Medium size.

Any clue?

windows-10-generalwindows-apivs-general
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HI

0.Could you please enter winver in command prompt on win10 computer and look the os version and os version number ?[for example windows 10 enterprise 1809 (os build 17763.316)

1.Did you check if the same issue happen on other version of win10 ?

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1 Answer

RLWA32-6355 avatar image
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RLWA32-6355 answered JiaYou-MSFT commented

Try adding images for each size that are 24-bit color depth to your icon file. According to images-and-icons-for-visual-studio, "In order to display properly in Windows Explorer, ICO files must be saved-down to 24-bit and 8-bit color depths for each image size.".


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HI GiorgioSfiligoi-645,

Is there any progress on your question?

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HI GiorgioSfiligoi-645,

Is there anything I can help you?

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