Difference Between selection

[#1]

Hi,

i have to make a formula who is the difference between a selection who i do.

Example, i have a table who contain the variable A B C, if i make a selection ( A B for example) my formula can calculate A - B.

Thank You

[johnw]

max(FieldName)-min(FieldName) ???

I don't think I understand the question.

[wizardo]

hi there,

maybe somthing like this?

i put this in a textbox.

=if(GetSelectedCount(your_Fieldname)=2,subfield(GetFieldSelections(your_Fieldname),',',2)-subfield(GetFieldSelections(your_Fieldname),',',1),'please select only two values in field your_Fieldname')

Mansyno