TWebUpdate Component Issues

Hi,

 
Need to know what the following properties are:
 
ReceiveTimeOut.  I am testing but the URL specified in the webupdate component does not exist.  It then seems to hang the program.  Surely it should just check and if URL does not exist then continue.
 
TempDirectory:  what is this?
 
UseWinTempDir.  If set to False then where does it copy the replacment version too.
 
No documentation for them.