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How to implement serial control I want to get help when I first learned Delphi

Source: Internet
Author: User
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On the page, enter a four-digit number in maskedit.



Finally, the two digits of the four digits are produced as high 16 digits. Their backcodes are used as low 16 digits and transmitted to the specified serial port.

A certain period of time indicates that transmission is started and post-transmission is completed.

How can this problem be achieved?

Is it true that the XP operating system does not allow Embedded Assembly to perform serial operations directly?

Should I use API functions to implement my requirements?

Continue to read the full text of "how to implement serial control I just started learning Delphi and want to get help...

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