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Designed for both channels during the program to the user (User interface design). The program recognizes the contact. When receiving information from the user, but will respond only to the programs that have been written beforehand, as well as writing a program to recognize and respond to the key the user pressed keys x, if x is true, the program will respond to the program, but if the user presses a key that the program does not recognize the y press the y key, so do not do respond. To recognize and respond to the x key is to create a channel allowing the user to communicate with while pressing the key y is not a contact channel between the user programs. In addition, users will be able to contact the program through your computer's devices (mouse, Microphone, keyboard), and then creating a character for a channel, the user interact with the program, especially, can be done by these characters are similar to the buttons will work. When the user clicks any of these characters

Design channel between the user (User interface design)
program recognizes the contact. Upon receiving information from the user. But to meet the specific programs of interest. Which have already been pre-programmed as programmer to recognize and respond to the pressing x x If the user presses a key, it will respond by programming them. If the user presses a key y, which the program does not recognize the pressing y therefore do not respond
to recognize and respond to the press x to create a way for users to interact with the program. While pressing y is not a way to contact the user with
the user. You can contact the program through various devices. Computer (mouse, keyboard, microphone) is already creating a character. As another way to connect with a particular application. It can be done These characters are similar to the button will be activated when the user clicks on these characters.

Design of contact between a program and a user (User interface design)
.The program recognizes contact when receiving data from the user. But will only respond to what programs are interested. Which must be to write a program in advance, such as to write a program to recognize and respond to ารกด key x if the user press the key X.But if the user presses the key y program does not recognize the key pressing y didn't do meet
.Perception and response to the key pressing x create channels for users communicate with the program, while the key pressing y is not the channel contact between a user and the program
.In addition to the user will be able to contact the program through the components of a computer (mouse, keyboard, a microphone). Character creation. As one channel to the user contact with the program, in particular, can do.Like buttons, ready to work. When the user click on these characters
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