www.emgu.com/wiki
Same as h_prev pointer in CvSeq

Declaration Syntax
public Seq<T> HPrev { get; set; }
Public Property HPrev As Seq(Of T)
public:
property Seq<T>^ HPrev {
Seq<T>^ get ();
void set (Seq<T>^ value);
}
Assembly:
Emgu.CV (Module: Emgu.CV) Version: 1.5.0.0 (1.5.0.0)