>>We're starting a new project where we have to sign a file using an existing certificate on the local machine.
>>We have to upload our invoices via HTTPs but they have to be signed. We embed the invoice in a XML-file using base64 and this XML-file will be uploaded through HTTPs.
>>
>>Does anyone know how to do this in VFP ?
>
>See Thread #1482406.

In our case we don't need to buy a certificate.
We already have the certificate installed on our local machine. It was provided to us by our 3rd party.
We just need a way to digitally sign a PDF using this existing certificate.