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