// Oprogramowanie Roman Ryltsov
Crime An application which builds a DirectShow graph unexpectedly started failing with VFW_E_NOT_CONNECTED (0x80040209) error code. Scene The problem takes place during DirectShow graph building, yet in stopped state. Specific call which appeared to be giving out the error in first place appears to be EVR input pin’s IPin::ConnectionMediaType, and the problem is also specific…
A colleague pointed out that code snippet in previous post is misusing ATL’s ATLENSURE_SUCCEEDED macro making it [possibly] evaluate its argument twice in case of failure, that is evaluating into failure HRESULT code. As it is defined like this: #define ATLENSURE_SUCCEEDED(hr) ATLENSURE_THROW(SUCCEEDED(hr), hr) It does things in a straightforward way, for a code line ATLENSURE_SUCCEEDED(pFilterGraph.CoCreateInstance(CLSID_FilterGraph));…
If you dare to convert your C++ ATL Service project created with an earlier version of Visual Studio to version 2010, as I recently did, you might find yourself surprised with why the hell the bloody thing does not work anymore as a regular executable. After passing compiler/linker and SDK update issues, which you possibly…
A really long and annoying troubleshooting of a problem finally ended with a bug found in GetAdaptersInfo/GetAdaptersAddresses API. It may unexpectedly fail under the following conditions: 32-bit application 64-bit operating system or /3GB feature enabled on 32-bit operating system hosting process is linked with /LARGEADDRESSAWARE flag or has otherwise set it in binary header over…
It is as stupid as it sounds: you can add RBBS_NOGRIPPER flag to a rebar band to implement “lock controls” feature, but as soon as you start removing it – you miserably fail. A related thread on WTL group is dated year 2006. You can find the same dated 2003. Now it’s 2011 and it’s…
If you were adding and removing ActiveX controls programmatically with ATL, you might have noticed a nasty memory leak after final release of the control. Control added, removed and a leaky block is left om heap. Tracking simple memory leaks is not a rocket science with Microsoft C++ runtime, by adding _CRTDBG_MAP_ALLOC define, as described…
It was a sort of ridiculous problem: an attempt to instantiate a Microsoft.Jet.OLEDB.4.0 object failed with error. Still some applications are still running without problems connecting to Jet databases, how comes? There has been a number of posts on Internet, but none of the top ones appeared to be relevant. The problem is reproduced extremely…