sample code on how to specify custom icon for AutoSuggest provider using Integration API

AutoSuggestIcon.cs

[AutoSuggestProvider(Id = "SourceCopyAutoSuggestProvider", Name = "AutoSuggest provider for copying the source words")]
public class SourceCopyAutoSuggestProvider : AbstractAutoSuggestProvider
{
    private List<string> _segmentWordSuggestCandidates;

    public SourceCopyAutoSuggestProvider()
    {
        // Set the default icon for the suggestions from this provider
        Icon = new Icon(SystemIcons.Exclamation, 16, 16);
    }
}