Determines whether the specified stream is a PDF file by inspecting the first eight bytes of the data. If the data begins with «%PDF-x.y» the function returns the version number as integer (e.g. 14 for PDF 1.4). If the data is invalid or inaccessible for any reason, 0 is returned. The function never throws an exception.

public static int TestPdfFile(
	Stream stream
)

Public Shared Function TestPdfFile ( 
	stream As Stream
) As Integer

public:
static int TestPdfFile(
	Stream^ stream
)