There's this other code here too, below. Also made for Excel-Vba.
Sub DigitalSignedPDFCode()
Dim SignedPDF, FileCount, PFX_pass, strSignFName, inputpdf, epass, outputpdf
Dim pdfPDDoc As New AcroPDDoc, oJS As Object, oSign As Object, oPpklite As Object
Dim oSignInfo As Object
Dim ResultLogin As...