C#

Memory Leak Issues

Passing the address of an initialized CComBSTR to a function as an [out] parameter causes a memory leak.

In the example below, the string allocated to hold the string "Initialized" is leaked when the function OutString replaces the string.

CComBSTR bstrLeak(L"Initialized");
HRESULT hr = OutString(&bstrLeak);

To avoid the leak, call the Empty method on existing CComBSTR objects before passing the address as an [out] parameter.

Note that the same code would not cause a leak if the function's parameter was [in, out].

	Screen [] screens = Screen.AllScreens;<br />
<br />
	if (screens.GetUpperBound(0) > 0)<br />
	{<br />
		Screen secondary = screens[1];<br />
		secondMonitor.Bounds = secondary.Bounds;<br />
		secondMonitor.MinimumSize = secondary.Bounds.Size;<br />
	}<br />
	else<br />
	{<br />
		secondMonitor.Visible = false;<br />
	}

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Color Invert(Color c)
{
  int r = 255 - c.R;
  int g = 255 - c.G;
  int b = 255 - c.B;
  return Color.FromArgb((int)c.A, r, g, b);
}

Color Invert(Color c)
{
  Color c2 = Color.FromArgb(0xffffff - c.ToArgb());
  return Color.FromArgb((int)c.A, c2);
}