Introduction - If you have any usage issues, please Google them yourself
Create two horizontal scroll bar, used to control changes in X and Y values, X and Y were varied from 0 to 100, with the edit box shows the value of X and Y, the arrow on the scroll bar or slider and the slider and the gap between the arrow operation, to update the contents of the edit box, and the results of calculation to another edit box in the window display. If the input data directly to the edit box, and then " Calculate" menu, select " Sum" or " demand gap" , the calculated results of the other edit box in the window display.