The function compares two strings and returns the comparison result in form of an integer.
[in] The first string.
[in] The second string.
[in] Case sensitivity mode selection. If it is true, then "A">"a". If it is false, then "A"="a". By default the value is equal to true.
The strings are compared symbol by symbol, the symbols are compared in the alphabetic order in accordance with the current code page.