Public Class Form1
    Declare Function K7ConvertBatchToPDF Lib "e:\temp\pdfKonvert.dll" (ByVal _
      inFile As String, ByVal outFile As String, ByVal sheetCount As Integer) _
      As Integer
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As _
    System.EventArgs) Handles Button1.Click
        Dim a As Integer
        a = K7ConvertBatchToPDF("e:\temp\PDFBatch.txt", "e:\temp\Test.pdf", 2)
    End Sub
End Class