/// <summary>
/// Message handler which must be called from client form.
/// Processes Windows messages and calls event handlers.
/// </summary>
/// <param name="m"></param>
public void WndProc(ref Message m)
{
int devType;
char c;
if (m.Msg == WM_DEVICECHANGE)
{
// WM_DEVICECHANGE can have several meanings depending on the WParam value...
switch (m.WParam.ToInt32())
{
//
// New device has just arrived
//
case DBT_DEVICEARRIVAL:
devType = Marshal.ReadInt32(m.LParam, 4);
if (devType == DBT_DEVTYP_VOLUME)
{
DEV_BROADCAST_VOLUME vol;
vol = (DEV_BROADCAST_VOLUME)
Marshal.PtrToStructure(m.LParam, typeof(DEV_BROADCAST_VOLUME));
// Get the drive letter
c = DriveMaskToLetter(vol.dbcv_unitmask);
//
// Call the client event handler
//
// We should create copy of the event before testing it and
// calling the delegate - if any
StorageDetectorEventHandler tempDeviceArrived = StorageDetected;
if (tempDeviceArrived != null)
{
StorageDetectorEventArgs e = new StorageDetectorEventArgs();
e.Drive = c + ":\\";
tempDeviceArrived(this, e);
// Register for query remove if requested
if (e.HookQueryRemove)
{
// If something is already hooked, unhook it now
if (mDeviceNotifyHandle != IntPtr.Zero)
{
RegisterForDeviceChange(false, null);
}
RegisterQuery(c + ":\\");
}
} // if has event handler
}
break;
}
}
}
private void Sd_StorageDetected(object sender, StorageDetectorEventArgs e)
{
_notifyIcon.ShowBalloonTip(5000);
_policyForm.Drive = e.Drive;
_policyForm.Show();
}
