VB的put，get函数
Put 语句
将一个变量的数据写入磁盘文件中。
Put [#]filenumber, [recnumber], varname
Get 语句
将一个已打开的磁盘文件读入一个变量之中。
Get [#]filenumber, [recnumber], varname
例如：
dim B as byte
open "File1.txt" for binary as #1
get #1, 1, B
close #1
即可将File1.txt文件的第一个字节读入变量B
Dim S as string
S = "ABCDE"
open "File2.txt" for binary as #1
put #1, 1, S
close #1
即可将变量S的内容写入File2.txt中。
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