This function enables /disables to zoom an active picture by
the mouse wheel. Zooming keeps the position of mouse in the picture. For
this reason, in the window there can be displayed an area outside dimensions
defined in D2000 GrEditor.
Declaration
%HI_MouseWheelZoom(
INT in _iStep
)
Parameters
_iStep
0 - disables zoom with the mouse wheel.
>0 - size of zoom in thousandths of picture size.
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