Shading for X error bars

Hi,

My graphs are not y = f(x) but x =f(y), where y is the height.

Is it possible to shade X error bars only? When I try, it seems that only Y error bar shading is possible. On the "Error Bars" window, it is written "X error Bars: Not Applicable".

For example in the attached graph, I'd like to shade between min and max curves.

That happens in the example of the manual:

Make/O/N=200 jack=sin(x/8), sam=cos(x/9) + (100-x)/30
Display /W=(64,181,499,520) jack,jack,sam
ModifyGraph lsize(jack)=0,rgb(sam)=(0,0,65535)
ErrorBars jack shade={0,0,(0,65535,0,10000),(0,0,0)},const=2
ErrorBars jack#1 shade={0,0,(0,65535,0,10000),(0,0,0)},const=1
ErrorBars sam shade={0,0,(65535,0,0,10000),(0,0,0)},const=1

Thank you in advance,

Best regards.