yes it's possible.
it will need to populate the underlying table to the subform. Assuming
1. working days means Mon-Fri and you are ignoring holidays
2. 'next 10' means start date plus another 9 days (10 days in total)
then some code in the unbound textbox afterupdate (or perhaps better on a button click event) would be something like
Code:
dim I as integer
dim j as integer
I=0
j=0
while I<10
if weekday(nameoftextboxhere+j,vbmonday)<6 then
currentdb.execute("INSERT INTO myTable (wDate) Values(#" & format(nameoftextboxhere+i,"mm/dd/yyyy") & "#")")
I=I+1
end if
j=+1
wend
mysubformcontrolnamehere.requery
mysubformnamehere.form.filter="[WDate]>=#" & format(nameoftextboxhere,"mm/dd/yyyy") & "#"
mysubformcontrolnamehere.filteron=true
tip, set format of your textbox to short date to enable the calendar selector