Abstract
Nowadays the society that world is a to automate highly, various equipments can and the calculator machine, but the most simple automation machine method is to use the string to go the correspondence. The string goes to correspond by letter existent time already not short, along with the development of science and technology, it did not is replace not only, it is applied on the contrary and more and more widely. This is because a realization that goes to correspond by letter the equipments hardware equipments is more and in brief, and the usage is also more simple
The string go the correspondence is a calculator occasionally calculator and other hard wares correspondence of a kind of means, is been apply in the data to collect broadly, the industry supervision etc. realm. The string goes a people's correspondence to usually be used for, so should find out a kind of method that can repeat the exploitation, using from now on with the convenience. C++ the Builder gave the program design the personnel provide the fairly good development environment, the development VCL module is also very simple. Pass will used for to operate to the an of the function of Windows API seal to pack in the module that we makes to order by ourselves, can carry on various operation to the a very expediently, and return the ability to use again under various plaits distance environment.
A design will make use of the C++ Builder the terrace of Builder develops a VCL module, carrying out the environment of WIN32 in order to under of the a development that corresponds by letter the procedure. Make use of the data of for that module to develop a calculator to exchange the interface also, carry out the basic data commutation.
Keyword：Serial Communication；C++ Builder；Module；Function of API
