Vbs-之提供的字符串处理函数
left(String,Length):Returns a specified number of characters from the left side of a string
Right(String,Length):Returns a specified number of characters from the right side of a string
Len(String):To determine the number of characters in string
LCase(string):Returns a string that has been converted to lowercase
UCase(string):Returns a string that has been converted to uppercase.
InStr(string1,string2):Returns the position of the first occurrence of one string within another.
string1
Required. String expression being searched.
string2
Required. String expression searched for.

InstrRev(string1, string2[, start[, compare]]):Returns the position of an occurrence of one string within another, from the end of string.