Declaration

Delphi

function CheckDoc: Integer; stdcall;

ActiveX

HRESULT _stdcall CheckDoc([out, retval] long* Value);

Description

Function to check a signed PDF document, in order to see if the document was not changed after signing.

Return value

This function returns 0, 1, 2 or 3.

0	No document loaded or error opening doc.
1	No Biodata found. Document has not been signed or Biodata is erased from the document.
2	Biodata found in document and document has not been manipulated.
3	Biodata or document has been manipulated.
4	the document is extended with additional data, it is manipulated

Important:

If CheckDoc returns 3 or 4 you can not add new signatures to it, because the document has already been signed and was manipulated afterwards. The document is now invalid.

Sample

C#

// check status of a signed document
 
int check = SignAPIv4.CheckDoc();
 
switch(check)
{ 
	case 0: MessageBox.Show("No document loaded or error opening doc");
	break;
                
	case 1: MessageBox.Show("No Biodata found. Document has not been signed or Biodata is erased from the document.");
	break;
                
	case 2: MessageBox.Show("Biodata found in document and document has not been manipulated.");
	break;
                
	case 3: MessageBox.Show("Biodata or document has been manipulated.");  
	break;
   
    case 4: MessageBox.Show("The document has been manipulated.");  
	break;
                
	default: MessageBox.Show("Unkown Error");          
	break;
}