Assign A Resutset

Hi

How can I assigne a value that return from a stored procedure into a variable?
Example:

if I execute this:

declare @szquery as nvarchar(256)
declare @icount as int

--I must pass a string query because the name of the field and the table are ---the variable that i passed

set @szquery='Select count(reckey) as dummy from table1 '

exec sp_executesql @szquery

the result is:

dummy
-----------
15770

(1 row(s) affected)
declare @b as int

I want assigned 'dummy' into a variable

set @icount= ???

if I ecexute this:

print @icount

the result :

15770


please help me out in this issue and i'd appreciate that.

tanks
Emiliano