Hello Dimitri,
When you place a picture control on your UIR then try to load an image, the image that is loaded from the .ico file is the same image that would be loaded if you looked at the .ico file in Windows Explorer. In order to force CVI to use the 48x48 version, you can save a version of the .ico file that only includes the 48x48 version then use this .ico file for the picture control.
Thanks.
Wendy L
LabWindows/CVI Developer Newsletter