C#

int n;
object obj = n;
int nb = GetParam(ref obj);

public object Parameters 
{
   get 
   {
	IntPtr paramptr = IntPtr.Zero;
	int result = GetFunction( paramptr);
	object param = null;
	Marshal.PtrToStructure(paramptr, param); // ????
	return param;
   }
   set 
   {
	IntPtr paramptr = IntPtr.Zero;
	Marshal.StructureToPtr(value, paramptr, true);
	int result = SetFunction( paramptr);
   }
}

[DllImport("user32.dll", SetLastError=true)]
public static extern bool RegisterHotKey(
    IntPtr hWnd,         // handle to window
    int id,            // hot key identifier
    KeyModifiers fsModifiers,  // key-modifier options
    Keys vk            // virtual-key code
    );
 
[DllImport("user32.dll", SetLastError=true)]
public static extern bool UnregisterHotKey(
    IntPtr hWnd,  // handle to window
    int id      // hot key identifier
    );
 
[Flags()]
public enum KeyModifiers
{
    Alt = 1,
    Control = 2,
    Shift = 4,
    Windows = 8
}

bool success = RegisterHotKey(Handle, 100, 
    KeyModifiers.Control | KeyModifiers.Shift, Keys.J);
System.Diagnostics.Trace.WriteLine(
    "Success = " + success.ToString());

UnregisterHotKey(Handle, 100);

protected override void WndProc( ref Message m )
{
	const int WM_HOTKEY = 0x0312;
 
	switch(m.Msg)
	{
	case WM_HOTKEY:
		MessageBox.Show("Hotkey pressed");
		break;
	}
 
	base.WndProc(ref m );
}