MyCertificate is Certificate

// Open the certificate picker of Windows
MyCertificate = CertificateSelect()

// Cancellation or error
IF MyCertificate.Name = "" THEN
	RETURN
END

// Checks whether the selected certificate is valid for signing
IF MyCertificate.ValidForSignature = False THEN
	Info("The selected certificate cannot be used to generate a signature.")
	RETURN
END

// Retrieve the buffer containing the signature
bufSignature is Buffer
bufSignature = CertificateSignString("Character string to sign", MyCertificate)

// Retrieve the certificate found in the signature buffer
MyExtractedCertificate is Certificate
MyExtractedCertificate = CertificateExtract(buffSignature)

// Manage the errors
IF MyExtractedCertificate = Null THEN
	RETURN
END

// Open the window for certificate properties
CertificateOpenProperties(MyExtractedCertificate)