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Question
How can u handle Un Managed Code Exceptions in ASP.Net?
 Question Submitted By :: Guest
I also faced this Question!!     Rank Answer Posted By  
 
  Re: How can u handle Un Managed Code Exceptions in ASP.Net?
Answer
# 1
.NET handles errors through exception classes. COM handles 
errors through 32-bit data types called HRESULTs. All of 
the .NET exception classes include HResult properties that 
map to COM HRESULT codes.

If an exception occurs in a .NET object, the exception is 
automatically mapped to the appropriate HRESULT and 
returned to COM. Similarly, if an exception occurs in a COM 
object, the COM HRESULT is mapped to the appropriate 
exception class, which is returned to .NET, where it can be 
handled just like any other exception.

If you are creating your own .NET exception classes for use 
with COM, be sure to set the class’s HResult property so 
that the exception can be handled within COM.
 
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