Can I create custom exception in c++ and then catch it in javascript code? RRS feed

  • Question

  •  I developed one metro app in javascript and another WinRT component in c++.
     Also I declared a custom exception in c++ WinRT component.
     How can i catch this custom exception in my javascript app?
     Thanks for your help.

    Friday, January 27, 2012 10:15 AM


All replies

  • Hi Ring_ABC,


    All Windows Runtime exceptions are ref classes which derive from Platform::Exception. When you throw an exception across the ABI boundary, you must throw one of these Exception types. You cannot derive your own type from Platform::Exception. To throw a custom exception, you can use COMException and supply a user-defined HRESULT.

    please refer to http://msdn.microsoft.com/en-us/library/windows/apps/hh441561(v=vs.110).aspx for more details.


    Best wishes,

    Robin [MSFT]
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    Please remember to mark the replies as answers if they help and unmark them if they provide no help.
    Friday, January 27, 2012 1:44 PM
  • So can you provide a little more detail?

    For example, this is what I'm doing right now:

       public: static void MyErrorClass::CheckErrorCode(int code)
          if(code < 1)
             throw ref new COMException(code);

    But, what happens in C#, is the following, which is pretty much useless for my customers:


    An exception of type 'System.Exception' occurred in CSMainDemo.exe but was not handled in user code

    WinRT information: The text associated with this error code could not be found.

    Additional information: The text associated with this error code could not be found.

    If there is a handler for this exception, the program may be safely continued.

    Monday, June 11, 2012 3:41 PM
  • The RP contains a String constructor for FailureException. However using it, does not give me the string the calling app. Its still "Unknown failure" error text.
    Wednesday, June 13, 2012 9:04 AM
  • Have to pick this up again. How do the WinRT components from MSFT attach custom error messages? I tried RoOriginateError to no avail.
    Thursday, February 21, 2013 9:19 AM
  • The link referenced above:


    results in "This topic is no longer available".

    I am very interested in this information, is it available anywhere else?

    Thursday, May 28, 2015 11:00 PM