Converting System.Exception to System.Web.HttpCompileException in global.asax Application_Error - .NET 1.1

Hello.  I am capturing an exception in the above event handler using Server.GetLastError().  I would like to access the Results and SourceCode properties of an inner exception of type System.Web.HttpCompileException, but cannot do so, and am unable to implicitly convert a general exception to System.Web.HttpCompileException.  Any ideas?
 Thank you in advance,
Chris.

Solved my own problem via the following code.  Feeling kind of embarrassed over the simple fix. 
if (lastErr.InnerException.GetType().ToString() == "System.Web.HttpCompileException")
{
	compileErr = lastErr.InnerException as HttpCompileException;

	errMsg += "Results: " + compileErr.Results + "<BR>";
	errMsg += "Source Code: " + compileErr.SourceCode + "<BR>";
}