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• Chained user-defined explicit conversions in C#, Part Three

  Jeroen Frijters knew the answer to my challenge of last time: how is it that Foo foo = new Foo(); can cause a runtime conversion failure? And how is it that Bar bar = (Bar)(new Baz()); can succeed even if there is no user-defined conversion or built-in Read More... Posted Friday, April 20, 2007 7:00 AM by Eric Lippert | 2 Comments Filed under: COM Programming, C#, Puzzles, Conversions

• Solution to Spot the Defect Part Two

  There were l ots of good responses to my challenge of yesterday. There are two major defects in this code: that it leaks memory, and that it passes an incorrect variant type to Invoke. There are also a considerable number of minor defects and questionable Read More... Posted Tuesday, August 17, 2004 11:35 AM by Eric Lippert | 4 Comments Filed under: COM Programming, Puzzles

• Spot the Defect, Part Two

  Some fun for a Monday -- for some definition of fun, I suppose. Here's a recent posting to Microsoft's internal Spot The Defect mailing list. HRESULT CInvokeHelper::InvokeHelper(IDispatch *pDisp, long dispid, SAFEARRAY **param1) { HRESULT hr; DISPPARAMS Read More... Posted Monday, August 16, 2004 9:01 AM by Eric Lippert | 22 Comments Filed under: COM Programming, Puzzles