The icon size does not increase when you increase the default icon size in the "Window Color and Appearance" dialog box on a Windows Vista-based computer or on a Windows Server 2008-based computer

When you increase the default icon size in the Window Color and Appearance dialog box on a Windows Vista-based computer or on a Windows Server 2008-based computer, the icon size does not increase. Instead, the space between the icons increases.

This behavior occurs because the ImageList_GetIconSize function retrieves the icon size in the IImageList interface. The ImageList_GetIconSize function does not return the 256 x 256 icon size from the layered image list.

The ImageList_GetIconSize function retrieves the dimensions of the images in an image list. All the images in an image list have the same dimensions.

This behavior is by design.

For more information about the IImageList interface and the functions that the IImageList interface contains, visit the following Microsoft Developer Network (MSDN) Web sites: