How to add two nos. using only one text box?

[nilesh3]

I want to add two nos. by using only one text box and 2 command boxes 1st for + and another for =.

[vdraceil]

Yeah..it is possible.
Prompt the user to enter a number in the text box.
Extract that into a variable and clear the textbox if the user clicks '+'.
If the user enters another number and presses '+' add the textbox content to that variable and so on..
Finally display that variable in your textbox when the user presses '='.

[smartchap]

I have already posted answer in other post by you. Please see that.