C#

bool mouseDown;
const int WM_NCMBUTTONDOWN = 0x00a7;
const int WM_NCMBUTTONUP = 0x00a8;
protected override void WndProc(ref Message m)
{
  if (m.Msg == WM_NCMBUTTONDOWN) mouseDown = true;
  else if (m.Msg == WM_NCMBUTTONUP) mouseDown = false;
  base.WndProc(ref m);
}

"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell

The Second EuroCPian Event will be in Brussels on the 4th of September

Can't manage to P/Invoke that Win32 API in .NET? Why not do interop the wiki way!

public static Stream GetZipResourceStream(CultureInfo culture)
{
  // Get a reference to this assembly.
  Assembly asm = typeof(SiteBuilder).Assembly;

  // Get the neutral resources language, if any.
  CultureInfo neutral = GetNeutralResourcesLanguage(asm);
  if (culture == null || !culture.Equals(neutral))
  {
    // Get the satellite contract version, or use this assembly's version.
    Version v = GetSatelliteContractVersion(asm);
    if (v == null) v = asm.GetName().Version;

    try
    {
      // Now get the satellite assembly for the culture and version.
      asm = asm.GetSatelliteAssembly(culture, v);
    }
    catch
    {
      // Try to get the invariant culture's satellite assembly and version.
      try
      {
        asm = asm.GetSatelliteAssembly(culture.Parent, v);
      }
      catch {}
    }
  }

  // Get the manifest resource stream.
  Stream s = asm.GetManifestResourceStream(SiteResource);
  return s;
}

internal static CultureInfo GetNeutralResourcesLanguage(Assembly a)
{
  if (a == null) throw new ArgumentNullException("a");

  // If the assembly is 'mscorlib.dll', return an invariant culture.
  if (a == typeof(object).Assembly)
    return CultureInfo.InvariantCulture;

  // Try to find the NeutralResourcesLanguageAttribute.
  NeutralResourcesLanguageAttribute[] attrs =
    (NeutralResourcesLanguageAttribute[])
    a.GetCustomAttributes(typeof(NeutralResourcesLanguageAttribute), false);

  // If the attribute wasn't found, return an invariant culture.
  if (attrs.Length == 0) return CultureInfo.InvariantCulture;

  try
  {
    // If the name is valid, return a CultureInfo from it.
    return new CultureInfo(attrs[0].CultureName);
  }
  catch (ThreadAbortException)
  {
    throw;
  }
  catch (Exception ex)
  {
    throw new ArgumentException(
	  BLR.FormatString("InvalidNeutralResourcesLanguageCulture",
      a.ToString(), attrs[0].CultureName), "a", ex);
  }
}

internal static Version GetSatelliteContractVersion(Assembly a)
{
  if (a == null) throw new ArgumentNullException("a");

  // If the assembly is 'mscorlib.dll', return null.
  if (a == typeof(object).Assembly)
    return null;

  SatelliteContractVersionAttribute[] attrs =
    (SatelliteContractVersionAttribute[])
    a.GetCustomAttributes(typeof(SatelliteContractVersionAttribute), false);

  // If the attribute wasn't found, return null.
  if (attrs.Length == 0) return null;

  try
  {
    // If the version is valid, return a Version from it.
    return new Version(attrs[0].Version);
  }
  catch (Exception ex)
  {
    throw new ArgumentException(
	  BLR.FormatString("InvalidSatelliteContractVersion",
      a.ToString(), attrs[0].Version), "a", ex);
  }
}

"If a man empties his purse into his head, no man can take it away from him, for an investment in knowledge pays the best interest." -- Joseph E. O'Donnell

The Second EuroCPian Event will be in Brussels on the 4th of September

Can't manage to P/Invoke that Win32 API in .NET? Why not do interop the wiki way!