Load data into System forms

Dear SAP B1 experts,

I am facing the following problem (SAP B1 8.81, C#).

I have a valid XML file to create a Credit Note.

I do it as follows (I am showing the minimum amount of lines):

salesCredit.Browser.ReadXml(doc.InnerXml, 0);
salesCredit.Add();

(where the variable doc is type XmlDocument)

As I said, the method works well and it adds a document to the database.

Now, I wonder if there is any way to do exactly the same thing, but loading the information directly into the Sales Order system form (type = 139), instead of the database.

The thinking behind this is the following: With the first method, the user can't edit the document (add, remove, change lines), but with the second it is possible. After the user finishes doing the changes, the transaction would be committed to the database after hitting the 'Add' button.

Is that possible? I've been told it is, but don't know how.

Best regards

N