We present a determination of the gluon polarisation in the nucleon, based on the longitudinal double-spin asymmetry of DIS events with including a pair of large transverse-momentum hadrons in the final state. The data were obtained by the COMPASS experiment at CERN using a 160 GeV/c polarised muon beam scattering off a polarised target. The gluon polarisation is evaluated by a Neural Network approach for three intervals of the gluon momentum fraction covering the range . The values obtained at leading order in QCD do not show any significant dependence on . Their average is at average and a scale of .