Use this function to read a textfile. The function demands the following parameters:
Parameter 1 -> file path + file name
Parameter 2 -> [index of line, FileSize]
Parameter 2 is optional and can be 'FileSize' or a number indexing the line inside the file. If you dont use it, the last line of textfile is returned.

Example:
%System.ReadFile('C:\testfile.txt',FileSize)
Using this function call returns the 4 if the file "C:\testfile.txt" has 4 lines of text.
%System.ReadFile('C:\testfile.txt',34)
Using this function call returns the 34th line of file "textfile.txt" located on C:\.
%System.ReadFile('http://www.mysite.de/read.htm',2)
Using this function call returns 2th line of file read.htm. Before the function can return the data, the file is downloaded.