This method is useful for automatic form fill-out purposes.

Usage:

PdfDocument objDoc = objPdf.OpenDocument( @"c:\path\1040nr.pdf" );
objDoc.Form.Flatten();
objDoc.Save( @"c:\path\flattened.pdf" );

Param is a PdfParam object or parameter string containing various Boolean parameters, all optional, including:

• RemoveXFA - this parameter is equivalent to calling the RemoveXFA method.
• Flatten - this parameter is equivalent to calling the Flatten method.
• FlattenAnnots - this parameter flattens items that are not technically form fields but field-like annotations.
• RemoveJavaScript - this parameter removes all JavaScript from the document's catalog. This prevents the message "This PDF form requires a newer version of Adobe Acrobat" from popping up.
• Reset - this parameter resets the current graphics state for all pages of the document. This may be useful if the flattening procedure produces unexpected output or no output at all. This parameter was introduced in Version 3.4.0.30931.

This method was introduced in Version 2.9.

Usage:

PdfDocument objDoc = objPdf.OpenDocument(@"c:\path\1040nr.pdf");
objDoc.Form.Modify( "Flatten=true; RemoveJavaScript=true" );
objDoc.Save( @"c:\path\flattened.pdf" );

Usage:

PdfDocument objDoc = objPDF.OpenDocument( @"c:\1040nr.pdf" );
objDoc.Form.RemoveXFA();

' Fill in the form
...