function EnableWindow(nHWND, bEnable)
    local nEnable=0
    if bEnable then nEnable = 1 end
    DLL.CallFunction("user32.dll", "EnableWindow", nHWND..","..nEnable, DLL_RETURN_TYPE_LONG, DLL_CALL_STDCALL)
end
function MouseClipping()
    _RECT = Memory.CreateStructure("long, long, long, long");
    Memory.SetStructureData(_RECT, 1, 0, nLeft, "");--left
    Memory.SetStructureData(_RECT, 2, 0, nTop, "");--top
    Memory.SetStructureData(_RECT, 3, 0, nRight, "");--right
    Memory.SetStructureData(_RECT, 4, 0, nBottom, "");--bottom
    DLL.CallFunction(_SystemFolder.."\\User32.dll", "ClipCursor", _RECT, DLL_RETURN_TYPE_LONG, DLL_CALL_STDCALL)
    Memory.FreeStructure(_RECT);
end
function Screen_coordinates()
    nLeft = 0;
    nTop = 0;
    nRight = System.GetDisplayInfo().Width;
    nBottom = System.GetDisplayInfo().Height;
end
function Do_clipping()
    Input.SetText ("Input_left", nLeft);
    Input.SetText ("Input_top", nTop);
    Input.SetText ("Input_right", nRight);
    Input.SetText ("Input_bottom", nBottom);
    Page.StartTimer(250);
    Label.SetText ("Label4", "Press Alt+F4 to disable clipping.");
    Ex_it = 1;
end