Managed C++/CLI

<br />
[StructLayout(LayoutKind.Sequential)]<br />
public struct DEV_BROADCAST_VOLUME<br />
{<br />
    public int dbcv_size;<br />
    public int dbcv_devicetype;<br />
    public int dbcv_reserved;<br />
    public int dbcv_unitmask;<br />
}<br />
protected override void WndProc(ref Message m)<br />
{<br />
    const int WM_DEVICECHANGE = 0x0219;<br />
    const int DBT_DEVICEARRIVAL = 0x8000; // system detected a new device<br />
    const int DBT_DEVTYP_VOLUME = 0x00000002; // logical volume<br />
    //we detect the media arrival event<br />
    if (m.Msg == WM_DEVICECHANGE && m.WParam.ToInt32() == DBT_DEVICEARRIVAL)<br />
    {<br />
        int devType = Marshal.ReadInt32(m.LParam,4);<br />
        if(devType == DBT_DEVTYP_VOLUME)<br />
        {<br />
            DEV_BROADCAST_VOLUME vol;<br />
            vol = (DEV_BROADCAST_VOLUME) Marshal.PtrToStructure(m.LParam,typeof(DEV_BROADCAST_VOLUME));<br />
            MessageBox.Show(vol.dbcv_unitmask.ToString("x"));<br />
        }<br />
    }<br />
    base.WndProc (ref m);<br />
}<br />

<br />
__gc struct Volume<br />
{<br />
   int size;<br />
   int devicetype;<br />
   int reserved;<br />
   int unitmask;<br />
}<br />
<br />
protected: void WndProc(System::Windows::Forms::Message* message)	<br />
{<br />
   ...<br />
   if(message->Msg == WM_DEVICECHANGE)<br />
   {<br />
      if(message->WParam == DBT_DEVICEARRIVAL)<br />
      {<br />
	 lVolume = (Volume*)Marshal::PtrToStructure(message->LParam,__typeof(Volume));<br />
						<br />
	 String* str = MaskToLogicalPaths(lVolume->Mask);<br />
	 this->m_FoundBox->Text = String::Format("Plugged In: {0}",str);<br />
      }<br />
      else <br />
      if(message->WParam == DBT_DEVICEREMOVECOMPLETE)<br />
      {<br />
	 this->m_FoundBox->Text = String::Format("UnPlugged: {0}",message->WParam.ToString());<br />
      }                <br />
   }<br />
}<br />

<br />
__gc class CRichTextBuffer<br />
{<br />
public:<br />
	CRichTextBuffer()<br />
	{<br />
		m_BufferSize = 32;<br />
		m_BufferPosition = 0;<br />
		m_buf = new char[m_BufferSize];<br />
	}<br />
<br />
public:<br />
	bool CreateCDParagraph(CDPABDEFINITION __gc *Definition)<br />
	{<br />
		Int32 nSize;<br />
		bool bResult = false;<br />
		int nStep = 0;<br />
<br />
		try<br />
		{<br />
			// Notes API function to retrieve length of PABDEF<br />
			nSize = ODSLength(_CDPABDEFINITION); nStep++;<br />
<br />
			// this line will lock the entire object<br />
			// is it the solution?<br />
			//int __pin* pPosition = &this->m_BufferPosition;<br />
			<br />
			// will increment size m_buf if needed<br />
			if ( CheckSize(nSize) ) <br />
			{<br />
				LPTSTR LPStrResult = new TCHAR[nSize]; nStep++;<br />
				LPTSTR LPStrTmp = LPStrResult;//Car ODSWriteMemory modifie la valeur du pointeur en 1 param!!<br />
				nStep++;<br />
<br />
				// copy __gc PABDEF to __nogc PABDEF<br />
				CDPABDEFINITION Def;<br />
				CopyStructure( &Def, Definition ); nStep++;<br />
<br />
				// Notes API function: copy PABDEF in StrTmp (fct will increment StrTmp<br />
				ODSWriteMemory( &LPStrTmp, 10, &Def, 1 ); nStep++;<br />
<br />
				// copy all in the member m_buf<br />
				CopyMemoryInBuffer(LPStrResult, nSize); nStep++;<br />
				delete [] LPStrResult; nStep++;<br />
<br />
				bResult = true;<br />
			}<br />
		}<br />
		catch (Exception* e)<br />
		{<br />
			String *sMsg = String::Concat("Exception: ", e->get_Message()," - Step=", nStep.ToString());<br />
			System::Diagnostics::Debug::Assert(false, sMsg);<br />
			bResult = false;<br />
		}<br />
<br />
		return bResult;<br />
	}<br />
<br />
protected:<br />
	char *m_buf;<br />
	int m_BufferPosition;<br />
	int m_BufferSize;<br />
}<br />