Snippets

Finding GDI Leaks by counting GDI objects

class DbgGuiLeak
{
public:
    DbgGuiLeak ()
    {
        _guiResCount = ::GetGuiResources (::GetCurrentProcess (), GR_GDIOBJECTS);
    }
    ~DbgGuiLeak ()
    {
        int leaks = ::GetGuiResources (::GetCurrentProcess (), GR_GDIOBJECTS) - _guiResCount;
        if (leaks != 0)
        {
            std::cout << "Gui Resources Leaked: " << leaks << std::endl;
        }
    }
private:
    unsigned _guiResCount;
};

• Quelle: Reliable Software - GDI Leaks
• Also Useful: GDIView (Tool which shows which GDI resources are allocated from which process)

Converting GUID to char*

<code class="cpp">
#include <atlconv.h>

void main(void)
{
  USES_CONVERSION;
  OLECHAR* bstrGuid;
  StringFromCLSID(<GUID>, &bstrGuid);
  printf("%s\n", W2A(bstrGuid));
  ::CoTaskMemFree(bstrGuid);
}
</code>