Hi Rafa
in source GPaned.prg add small corect to set position of cutter in
paned window

in CLASS GPANED FROM GWIDGET
METHOD PostCutt( x ) INLINE gtk_paned_set_position( ::pWidget, x ) // New

in METHOD New( lVertical, oParent, lExpand, lFill, nPadding,
lContainer, x, y, cId, uGlade,;
uLabelTab, nWidth, nHeight, lEnd, lSecond, lResize, lShrink,;
left_ta, right_ta, top_ta, bottom_ta, xOptions_ta,
yOptions_ta, nPos ) CLASS GPANED // new variable nPos

and add source like as
IF nPos == NIL
::PostCutt( nPos )
ENDIF
before ::Show()
and in gclass.ch
after POS add [CUTTERPOS <pos>];

10x,
Rosen