Get A return value with EXEC?

Hi, I have an sql query like this :

DECLARE
@.TableName varchar(200),
@.ColumnName varchar(200),
@.EmployeeID varchar(200),
@.Result varchar(200);

SET @.TableName = 'Customer';
SET @.ColumnName = 'First_Name';
SET @.CustomerID = 28;

-- This line return Error
SET @.Result = EXEC ('select' + @.ColumnName + ' from ' + @.TableName + ' where Recid = ' + @.CustomerID + '');

Print @.Result;

I am pretty sure the SELECT statement in EXEC will only return 0 or 1 record. But how to capture result from EXEC?

Thanks

I think you can do the following:
EXEC ('SET @.Result = select' + @.ColumnName + ' from ' + @.TableName + ' where Recid = ' + @.CustomerID + '');