Create a watermark version of the file. A watermark version is PDF file, but the whole content is added as pictures in an adjustable resolution. Furthermore, the picture is annotated by a watermark text going diagonal across each page.

There is no way to increase the quality or remove the watermark text completely afterwards.

public bool CreateWatermark(
	string strFile,
	string strText,
	short nDPI
)

Public Function CreateWatermark ( _
	strFile As String, _
	strText As String, _
	nDPI As Short _
) As Boolean

public:
bool CreateWatermark(
	String^ strFile, 
	String^ strText, 
	short nDPI
)