It copies and converts part of array of uchar type into a returned string.
[in] Array of uchar type.
[in] Position from which copying starts. by default 0 is used.
[in] Number of array elements for copying. Defines the length of a resulting string. Default value is -1, which means copying up to the array end, or till terminal 0.
[in] The value of the code page. There is a number of built-in constants for the most used code pages.