Zooming from one date to another date on X-Axis ?

[User (Legacy)]

I included two DateTimePickers on my Delphi Form. These return the date as 

DateTime Values (Julian). 

ChartFX works directly with this DateTime formatting when populating the 

X-Axis points. 

X-Axis is set to DateTime and the X-Axis shows the Date and Time fine when 

running the program. 

Now I want to zoom into the X-Axis from one Date till another Date. 

I get these Date values with the two DateTimePickers. 

This is how I pass it to the Chart but unfortunately this code doesn't do 

anything. 

ChartFX1.Axis[AXIS_X].SetScrollView(DateTimePickerFrom.DateTime, 

DateTimePickerTo.DateTime); 

Does anyone knows what I am doing wrong here? 

Thanks. 

M.Wasbauer