otl = doc:CreateOutline(parent, title, encoder)
doc:CreateOutline() creates a new outline object.
When doc:CreateOutline() succeeds, it returns the handle of created outline object. Otherwise, it returns Nil and the error handler is invoked.
Nil, the outline is created as a root outlineNil, the document's encoding is used#HPDF_INVALID_DOCUMENT - An invalid document handle was set.
#HPDF_FAILED_TO_ALLOC_MEM - Memory allocation failed.
#HPDF_INVALID_OUTLINE - An invalid parent outline is specified.