private void OnDeviceChange(DEV_BROADCAST_VOLUME DevDesc, DeviceChangeEventType EventType)
{
if (DeviceChange != null)
{
foreach (char ch in DevDesc.Drives)
{
DeviceChangeEventArgs a = new DeviceChangeEventArgs(ch, EventType);
DeviceChange(this, a);
}
}
}
protected override void WndProc(ref Message m)
{
if (m.Msg == WM_DEVICECHANGE)
{
DEV_BROADCAST_HDR head;
switch (m.WParam.ToInt32())
{
/*case DBT_DEVNODES_CHANGED :
* break;
* case DBT_CONFIGCHANGED :
* break;*/
case DBT_DEVICEARRIVAL:
head = (DEV_BROADCAST_HDR)Marshal.PtrToStructure(m.LParam, typeof(DEV_BROADCAST_HDR));
if (head.dbch_devicetype == DeviceType.DBT_DEVTYP_VOLUME)
{
DEV_BROADCAST_VOLUME DevDesc = (DEV_BROADCAST_VOLUME)Marshal.PtrToStructure(m.LParam, typeof(DEV_BROADCAST_VOLUME));
if (DevDesc.dbcv_flags == VolumeChangeFlags.DBTF_MEDIA)
{
OnDeviceChange(DevDesc, DeviceChangeEventType.DeviceInserted);
}
}
break;
/*case DBT_DEVICEQUERYREMOVE :
* break;
* case DBT_DEVICEQUERYREMOVEFAILED :
* break;
* case DBT_DEVICEREMOVEPENDING :
* break;*/
case DBT_DEVICEREMOVECOMPLETE:
head = (DEV_BROADCAST_HDR)Marshal.PtrToStructure(m.LParam, typeof(DEV_BROADCAST_HDR));
if (head.dbch_devicetype == DeviceType.DBT_DEVTYP_VOLUME)
{
DEV_BROADCAST_VOLUME DevDesc = (DEV_BROADCAST_VOLUME)Marshal.PtrToStructure(m.LParam, typeof(DEV_BROADCAST_VOLUME));
if (DevDesc.dbcv_flags == VolumeChangeFlags.DBTF_MEDIA)
{
OnDeviceChange(DevDesc, DeviceChangeEventType.DeviceRemoved);
}
}
break;
/*case DBT_DEVICETYPESPECIFIC :
* break;*/
}
}
base.WndProc(ref m);
}
