2. Select a form, drag and drop the surrounding squares to adjust the size of the form, set caption as "Recursive Sum" in the property window, and set the property value of startupposition as "Screen Center".
3. Find the frame control in the toolbox window, double-click it to create a frame 1 control on the form, change its caption property value to null, and adjust its size and position.
4. Create three label controls on the frame control, change their caption attribute values to "Input integer data", "Output cumulative sum" and "Recursive sum" in turn, and adjust their positions.
5. Modify the font attribute values of the three labels, the font is Wang Xizhi's calligraphy font, the font size is 1, and the font style is normal.
6. Create two text boxes text 1 and text2 in turn on the form, modify the text attribute values of the two text boxes to be empty, and adjust their positions.
7. Create two commmand controls on frame 1, change their caption property values to "Calculate" and "Exit" in turn, and adjust their positions and sizes.
8. Double-click the "Calculate" button to enter the code area, select Universal in the object, and then enter the code.
9. Select Command 1 as the object in the code area, and click the process. Enter text2.text = sum (text1.text) and enter end in the code area of commmand2.