Load a document from a file. Signing the document will overwrite the document, but see integer parameter "Optimize" of SignDocSignatureParameters. You can open FDF files that reference a PDF file; the referenced PDF file will be opened and the FDF file will be applied to the loaded copy.If the pathname of the referenced PDF file is not an absolute pathname, it will be interpreted as being relative to the directory containing the FDF file.

public SignDocDocument loadFromFile(
	string path,
	bool writable
)

Public Function loadFromFile ( 
	path As String,
	writable As Boolean
) As SignDocDocument

public:
SignDocDocument^ loadFromFile(
	String^ path, 
	bool writable
)

member loadFromFile : 
        path : string * 
        writable : bool -> SignDocDocument