class THbookTree: public TTree

THbookTree

A wrapper class supporting Hbook ntuples (CWN and RWN).
The normal TTree calls can be used, including TTree::Draw().
Data read directly from the Hbook file via THbookFile.

IMPORTANT NOTE
When setting the branch address (via THbookTree::SetBranchAddress)
for a branch in an Hbook block containing several names, eg
Hbook block SELEVN with the following variables:

*      1   * R*4  *         *              * SELEVN   * WGGS
*      2   * R*4  *         *              * SELEVN   * AM12
*      3   * R*4  *         *              * SELEVN   * AM34
*      4   * R*4  *         *              * SELEVN   * AM14
*      5   * R*4  *         *              * SELEVN   * AM32
*      6   * R*4  *         *              * SELEVN   * PtPI(4)
*      7   * R*4  *         *              * SELEVN   * PHIPI(4)
*      8   * R*4  *         *              * SELEVN   * THTPI(4)
one must define a C struct like:
struct {
Float_t Wggs;
Float_t Am12;
Float_t Am34;
Float_t Am14;
Float_t Am32;
Float_t Ptpi[4];
Float_t Phipi[4];
Float_t Thtpi[4];
} event;

and set ONLY the first variable address with:
h96->SetBranchAddress("Wggs",&event.Wggs);