Introduction - If you have any usage issues, please Google them yourself
Created as shown in the dialog-based applications in the graphic display area and draw a rectangle filled with a color brush inside the rectangle. Through the scroll bar control to set the fill color, and in the edit box shows the RGB color values, you can set the radio button rectangle border line, " display graphics" checkbox to control whether to display the rectangle. After setting, click the " Show" button in the " graphic display area" to display the new graphics effects. Click the " Exit" button to exit the program.