D
Daniel Diehl
Hi,
I'm looking for a solution to detect if a USB Sticker (USB Drive) ist
plugged in or plugged out. Currently Im able to detect Hardware Plugin
and Plugout but don't get any information what type of device it is.
Is there a way to get this information ?
Currenty my solution work in that way (Also from this group):
protected override void WndProc(ref Message m)
{
switch(m.Msg)
{
case Win32.WM_DEVICECHANGE: OnDeviceChange(ref m); break;
}
base.WndProc (ref m);
}
void OnDeviceChange(ref Message msg)
{
int wParam = (int)msg.WParam;
if(wParam == Win32.DBT_DEVICEARRIVAL)
{
statusBar.Text = "Hardware attached";
frmLockScreen.Close();
}
else if(wParam == Win32.DBT_DEVICEREMOVECOMPLETE)
{
statusBar.Text = "Hardware entfernt";
frmLockScreen.Show();
}
}
void RegisterHidNotification()
{
Win32.DEV_BROADCAST_DEVICEINTERFACE dbi = new
Win32.DEV_BROADCAST_DEVICEINTERFACE();
int size = Marshal.SizeOf(dbi);
dbi.dbcc_size = size;
dbi.dbcc_devicetype = Win32.DBT_DEVTYP_DEVICEINTERFACE;
dbi.dbcc_reserved = 0;
dbi.dbcc_classguid = Win32.GUID_DEVINTERFACE_HID;
dbi.dbcc_name = 0;
IntPtr buffer = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(dbi, buffer, true);
IntPtr r = Win32.RegisterDeviceNotification(Handle, buffer,
Win32.DEVICE_NOTIFY_WINDOW_HANDLE);
if(r == IntPtr.Zero)
Console.WriteLine(Win32.GetLastError().ToString());
}
class Win32
{
public const int
WM_DEVICECHANGE = 0x0219;
public const int
DBT_DEVICEARRIVAL = 0x8000,
DBT_DEVICEREMOVECOMPLETE = 0x8004;
public const int
DEVICE_NOTIFY_WINDOW_HANDLE = 0,
DEVICE_NOTIFY_SERVICE_HANDLE = 1;
public const int
DBT_DEVTYP_DEVICEINTERFACE = 5;
public static Guid
GUID_DEVINTERFACE_HID = new
Guid("4D1E55B2-F16F-11CF-88CB-001111000030");
[StructLayout(LayoutKind.Sequential)]
public class DEV_BROADCAST_DEVICEINTERFACE
{
public int dbcc_size;
public int dbcc_devicetype;
public int dbcc_reserved;
public Guid dbcc_classguid;
public short dbcc_name;
}
[DllImport("user32.dll", SetLastError=true)]
public static extern IntPtr RegisterDeviceNotification(
IntPtr hRecipient,
IntPtr NotificationFilter,
Int32 Flags);
[DllImport("kernel32.dll")]
public static extern int GetLastError();
}
Thanks for any hints,
daniel
I'm looking for a solution to detect if a USB Sticker (USB Drive) ist
plugged in or plugged out. Currently Im able to detect Hardware Plugin
and Plugout but don't get any information what type of device it is.
Is there a way to get this information ?
Currenty my solution work in that way (Also from this group):
protected override void WndProc(ref Message m)
{
switch(m.Msg)
{
case Win32.WM_DEVICECHANGE: OnDeviceChange(ref m); break;
}
base.WndProc (ref m);
}
void OnDeviceChange(ref Message msg)
{
int wParam = (int)msg.WParam;
if(wParam == Win32.DBT_DEVICEARRIVAL)
{
statusBar.Text = "Hardware attached";
frmLockScreen.Close();
}
else if(wParam == Win32.DBT_DEVICEREMOVECOMPLETE)
{
statusBar.Text = "Hardware entfernt";
frmLockScreen.Show();
}
}
void RegisterHidNotification()
{
Win32.DEV_BROADCAST_DEVICEINTERFACE dbi = new
Win32.DEV_BROADCAST_DEVICEINTERFACE();
int size = Marshal.SizeOf(dbi);
dbi.dbcc_size = size;
dbi.dbcc_devicetype = Win32.DBT_DEVTYP_DEVICEINTERFACE;
dbi.dbcc_reserved = 0;
dbi.dbcc_classguid = Win32.GUID_DEVINTERFACE_HID;
dbi.dbcc_name = 0;
IntPtr buffer = Marshal.AllocHGlobal(size);
Marshal.StructureToPtr(dbi, buffer, true);
IntPtr r = Win32.RegisterDeviceNotification(Handle, buffer,
Win32.DEVICE_NOTIFY_WINDOW_HANDLE);
if(r == IntPtr.Zero)
Console.WriteLine(Win32.GetLastError().ToString());
}
class Win32
{
public const int
WM_DEVICECHANGE = 0x0219;
public const int
DBT_DEVICEARRIVAL = 0x8000,
DBT_DEVICEREMOVECOMPLETE = 0x8004;
public const int
DEVICE_NOTIFY_WINDOW_HANDLE = 0,
DEVICE_NOTIFY_SERVICE_HANDLE = 1;
public const int
DBT_DEVTYP_DEVICEINTERFACE = 5;
public static Guid
GUID_DEVINTERFACE_HID = new
Guid("4D1E55B2-F16F-11CF-88CB-001111000030");
[StructLayout(LayoutKind.Sequential)]
public class DEV_BROADCAST_DEVICEINTERFACE
{
public int dbcc_size;
public int dbcc_devicetype;
public int dbcc_reserved;
public Guid dbcc_classguid;
public short dbcc_name;
}
[DllImport("user32.dll", SetLastError=true)]
public static extern IntPtr RegisterDeviceNotification(
IntPtr hRecipient,
IntPtr NotificationFilter,
Int32 Flags);
[DllImport("kernel32.dll")]
public static extern int GetLastError();
}
Thanks for any hints,
daniel