mohankumar554 -3 Junior Poster in Training

hi,
how to add the values of two text boxes when the tab index changes ie i have entered value in 10 in textbox1 and entered value 15 in textbox2 when i press on tab then the cursor changed to text box3 and the sum 25 is printed in text box 3. can u tell me the answer.. i am using C#.net.i need the solution in C#.net.