This function is used to open a text file according to the URL specified by the parameter.
Parameter
a - A String value which indicates the URL of the text file.
Return value
The return value is a long varchar.
Example
Suppose you have a text file at the following URL http://www.jinfonet.com/JReport/report.ini. The following example will open the text file report.ini.
openTxtURL("http://www.jinfonet.com/JReport/report.ini")