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' For complete examples and data files, please go to https://github.com/groupdocs-search/GroupDocs.Search-for-.NET
'create index
Dim index As New Index(Utilities.indexPath)
' index.IndexingSettings.QuickIndexing = true;
AddHandler index.ErrorHappened, AddressOf index_ErrorHappened
' QuickIndex ad = new QuickIndex();
index.AddToIndex(Utilities.documentsPath)

Dim fuzzySearchParameters As New SearchParameters()
fuzzySearchParameters.FuzzySearch.Enabled = True

' Run fuzzy search
Dim results As SearchResults = index.Search(searchString, fuzzySearchParameters)

' Run regex search
Dim regexString As String = "dropbox ^[A-Z0-9._%+\-|A-Z0-9._%+-]+@++[A-Z0-9.\-|A-Z0-9.-]+\.[A-Z|A-Z]{2,}$ folder"
Dim results1 As SearchResults = index.Search(regexString)

Dim synonymSearchParameters As New SearchParameters()
synonymSearchParameters.UseSynonymSearch = True

' Run synonym search without loaded synonyms
Dim results2 As SearchResults = index.Search(searchString, synonymSearchParameters)

'-----------------------------------------------------------------------------

''' <summary>
''' Event Handler for search options not supported in index
''' </summary>
''' <param name="sender"></param>
''' <param name="e"></param>
Private Shared Sub index_ErrorHappened(sender As Object, e As Search.Events.BaseIndexArg)
    ' e.Message contains corresponding message 
    'if search option is not supported
    'string notificationMessage = e.Message;
    Console.WriteLine(e.Message)
End Sub