For the program of the Data Link Simulation, we had choose the Visual C++ for our programming graphics interface. So our program is a bit like product of Visual Basic 6.0, but it is not Visual Basic.

And while design the interface, we have use a simple way to design it. It will let user or end usereasily to use it. And also it won't too complex for us and user to use and understand

Figure 15 : Program Interface

Not only this, when the user want to exit or terminate the program, it will show out the warning message to make sure the user option.

Figure 16 : Exit Message