Checks if a string contains only lowercase characters.
StringIsLower ( "string" )
As in other StringIs...() the check is stop if a Chr(0) is encountered inside the string.
Internally the C function is used to speed up the processing.
Note that digits/punctuation/whitespace will cause StringIsLower() to return 0.
StringIsAlNum, StringIsAlpha, StringIsASCII, StringIsDigit, StringIsSpace, StringIsUpper, StringIsXDigit, StringLower, StringUpper