Including quotes and backslashes in strings

Hi,
I'm having a very hard time with this.  I have an html file which contains a URL link.  It looks like this:
 
<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl="URLPath">URLLabel</asp:HyperLink> In my VB program, I open the file containing the line above, and I substitute in the actual URL in place of the string URLPath.  I use the VB Replace command. That all works fine.
But now I need to make sure that the 64 bit IE gets run, so I want to change the line above to something like this:
<asp:HyperLink ID="HyperLink1" runat="server" NavigateUrl="C:\Program Files\Internet Explorer\iexplore.exe " URLPath">URLLabel</asp:HyperLink>
I can't figure out how to do the quotes.  I tried 2 double quotes, 3 double ...