Imports IronOcr
Imports System.Threading

' Opens a Large PDF which may need to be cancelled early
Dim ocrTesseract As New IronTesseract() With {.Language = OcrLanguage.English}

Using ocrInput = New OcrInput()
    ocrInput.LoadPdf("large-report.pdf")

    ' Starts a read on the PDF using IronOCR
    Dim ocrRead As OcrReadTask = ocrTesseract.ReadAsync(ocrInput)

    Thread.Sleep(1000) ' Time passes...

    ' Cancellation Example:
    ocrRead.Cancel()
    ocrRead.Wait()
End Using