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Former Member

Desktop icons of PB 12.5.2 executables


I have a PB application with an icon (.ico file) having 16x16, 32x32, 48x48 and 256x256 images inside. I have correctly set up in the application object and put it in my PBR file.

I build my application and obtain the exe file, say dummy.exe.

Now, if I put a link on my desktop to dummy.exe the icon I see is low quality, as if Windows upscales the 16x16 or the 32x32 ones.

The strange thing is that if I then change the link icon (by selecting Properties > Change Icon) to point to the original ICO file, I see it in high quality.

Is that a PB limit or a Windows one?

Does anybody know how to build the .ico file to obtain best quality when I put a link of my app on the desktop?

Thank you very much



PB 12.5.2 Build 5789

Windows 8.1

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1 Answer

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    Former Member
    Nov 05, 2015 at 07:05 AM

    Hello Luca,

    according to "images for menus and toolsbars" from the helpfile, I would assume the same behaviour:

    When an icon file includes several images

    With the contemporary menu style and toolbar style, when an icon file includes several images, PowerBuilder uses the following image selection rules:

    If the images . . .

    PowerBuilder displays . . .

    Are all the same size

    8 bit, 16 bit, 24 bit, 32 bit, and 4 bit images in that order.

    Include 16 bit*16 bit images and also other sized images

    16 bit*16 bit images.

    Do not include 16 bit*16 bit images

    The image with the image size closest to 16 bit. For example, if one icon file contains 24*24 bit images and another icon file contains 32*32 bit images, then PowerBuilder selects the 24*24 bit images.

    Are greater than 16 bit images

    The image as 16*16 bit or 32*32 bit. If the icon image is 16*16, then it displays as 16*16. If the icon image is larger than 16*16, it will be displayed as 32*32.



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    • Former Member

      Thank you for your answer, Tobias.

      I made some tests and realized that the issue is Windows-related and not PB-related: it's Windows that extracts the ICO file from the exe and chooses the best one to display on the desktop.

      Anyway I restarted my PC... and now the icons are looking pretty 😊

      Windows mysteries...

      I will reopen the post if I have some more problems.