GH_DocumentIOGetDocumentThumbnail Method

Try and extract the preview image of a document. Not all gh/ghx files contain a thumbnail so this function may return null. The document itself is not loaded and rendered, so the thumbnail really has to be part of the file already.

public static Bitmap GetDocumentThumbnail(
	string filePath
)

Public Shared Function GetDocumentThumbnail ( 
	filePath As String
) As Bitmap