> Meer, Hans van der <mailto:H.vanderMeer@uva.nl>
> 17. Januar 2016 um 20:43
> Thanks Wolfgang. I am experimenting with your code and there has 
> arisen a problem. The book I am typesetting has some pages before the 
> text on page-1 starts (cover and so on). Therefore the code
>     
> \def\mypageref[#1]{\setpagestate[hvdm][#1]\color[red]{page=\pagenumber\ and 
> pageref=\pagestaterealpage{hvdm}{#1}}}
> produces "page=29 and pageref=31". Not as intended. Do I change the 
> macro \pagestaterealpage into what macro? I tried \pagestatepage, but 
> that wasn't the right idea.
>
> Now what further to change?
You can use the dataset command which lets you store other information, 
e.g. the current value of the visible pagenumber.

\definedataset[hans][delay=yes]

\setupuserpagenumber[number=3]

\starttext

One\setdataset[hans][one][pagenumber=\userpagenumber]

\page[+2]

Two\setdataset[hans][two][pagenumber=\userpagenumber]

Three\setdataset[hans][three][pagenumber=\userpagenumber]

\blank

\ifnum0\datasetvariable{hans}{two}{realpage}=0\datasetvariable{hans}{one}{realpage}
     The references are on the same page.
\else
     The references are on different pages.
\fi

\blank

\ifnum0\datasetvariable{hans}{two}{realpage}=0\datasetvariable{hans}{three}{realpage}
     The references are on the same page.
\else
     The references are on different pages.
\fi

\page

\starttabulate
\NC One   \NC \datasetvariable{hans}{one}{pagenumber}   \NC\NR
\NC Two   \NC \datasetvariable{hans}{two}{pagenumber}   \NC\NR
\NC Three \NC \datasetvariable{hans}{three}{pagenumber} \NC\NR
\stoptabulate

\stoptext

Wolfgang