numpad 5 by code (rescale y axis)

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NB: i want to do it by code, is it even possible?
Soewono Effendi  
use PostMessage windows API, WM_KEYDOWN message
Require windows DLL.
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Thank you.
And is there a way - by mql5 native code - to command the chart to react as if i double click the price scale ?
Soewono Effendi  
RTFM

https://www.mql5.com/en/docs/constants/chartconstants/enum_chart_property#enum_chart_property_integer
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Soewono Effendi #:
RTFM

https://www.mql5.com/en/docs/constants/chartconstants/enum_chart_property#enum_chart_property_integer

already saw, and no such thing there.
thank you.