public void ProcessWindowsMessage(ref Message m)
{
Win32Wrapper.DBTDEVTYP devType;
if (m.Msg == Win32Wrapper.WM_DEVICECHANGE)
{
switch (m.WParam.ToInt32())
{
case (int)Win32Wrapper.DBTDEVICE.DBT_DEVICEARRIVAL:
// New device has just arrived
devType = (Win32Wrapper.DBTDEVTYP)Marshal.ReadInt32(m.LParam, 4);
if (devType == Win32Wrapper.DBTDEVTYP.DBT_DEVTYP_DEVICEINTERFACE)
{
var e = new USBDeviceEventArgs();
USBDeviceAttached(this, e);
}
break;
case (int)Win32Wrapper.DBTDEVICE.DBT_DEVICEQUERYREMOVE:
// Device is about to be removed, any application can cancel the removal
devType = (Win32Wrapper.DBTDEVTYP)Marshal.ReadInt32(m.LParam, 4);
if (devType == Win32Wrapper.DBTDEVTYP.DBT_DEVTYP_DEVICEINTERFACE)
{
var e = new USBDeviceEventArgs();
/*Win32Wrapper.DEV_BROADCAST_DEVICEINTERFACE deviceInterface = new Win32Wrapper.DEV_BROADCAST_DEVICEINTERFACE();
*
* int size = Marshal.SizeOf(deviceInterface);
* deviceInterface.dbcc_size = size;
* Marshal.PtrToStructure(m.LParam, typeof(Win32Wrapper.DEV_BROADCAST_DEVICEINTERFACE));*/
USBDeviceQueryRemove(this, e);
}
break;
case (int)Win32Wrapper.DBTDEVICE.DBT_DEVICEREMOVECOMPLETE:
// Device has been removed
devType = (Win32Wrapper.DBTDEVTYP)Marshal.ReadInt32(m.LParam, 4);
if (devType == Win32Wrapper.DBTDEVTYP.DBT_DEVTYP_DEVICEINTERFACE)
{
USBDeviceRemoved(this, new USBDeviceEventArgs());
}
break;
}
}
}
public void ProcessWindowsMessage(ref Message m)
{
Win32Wrapper.DBTDEVTYP devType;
if (m.Msg == Win32Wrapper.WM_DEVICECHANGE)
{
// WM_DEVICECHANGE can have several meanings depending on the WParam value...
switch (m.WParam.ToInt32())
{
case (int)Win32Wrapper.DBTDEVICE.DBT_DEVICEARRIVAL:
// New device has just arrived
devType = (Win32Wrapper.DBTDEVTYP)Marshal.ReadInt32(m.LParam, 4);
if (devType == Win32Wrapper.DBTDEVTYP.DBT_DEVTYP_DEVICEINTERFACE)
{
USBDeviceEventArgs e = new USBDeviceEventArgs();
USBDeviceAttached(this, e);
}
break;
case (int)Win32Wrapper.DBTDEVICE.DBT_DEVICEQUERYREMOVE:
// Device is about to be removed, any application can cancel the removal
devType = (Win32Wrapper.DBTDEVTYP)Marshal.ReadInt32(m.LParam, 4);
if (devType == Win32Wrapper.DBTDEVTYP.DBT_DEVTYP_DEVICEINTERFACE)
{
USBDeviceEventArgs e = new USBDeviceEventArgs();
/*Win32Wrapper.DEV_BROADCAST_DEVICEINTERFACE deviceInterface = new Win32Wrapper.DEV_BROADCAST_DEVICEINTERFACE();
int size = Marshal.SizeOf(deviceInterface);
deviceInterface.dbcc_size = size;
Marshal.PtrToStructure(m.LParam, typeof(Win32Wrapper.DEV_BROADCAST_DEVICEINTERFACE));*/
USBDeviceQueryRemove(this, e);
}
break;
case (int)Win32Wrapper.DBTDEVICE.DBT_DEVICEREMOVECOMPLETE:
// Device has been removed
devType = (Win32Wrapper.DBTDEVTYP)Marshal.ReadInt32(m.LParam, 4);
if (devType == Win32Wrapper.DBTDEVTYP.DBT_DEVTYP_DEVICEINTERFACE)
{
USBDeviceEventArgs e = new USBDeviceEventArgs();
USBDeviceRemoved(this, e);
}
break;
}
}
}