private void UnRegisterCancelAutoPlay(CancelAutoPlayEventHandler capDelegate)
{
System.Runtime.InteropServices.ComTypes.IRunningObjectTable objTbl;
if (NativeMethods.GetRunningObjectTable(0, out objTbl) == NativeMethods.S_OK)
{
if (_CancelAutoPlayCookie != 0)
{
objTbl.Revoke(_CancelAutoPlayCookie);
_CancelAutoPlayCookie = 0;
}
if (_HWEventHandlerCookie != 0)
{
objTbl.Revoke(_HWEventHandlerCookie);
_HWEventHandlerCookie = 0;
// Remove our do-nothing handler to the list of MTPMediaPlayerArrival handlers so it
// does not show up as a choice in the AutoPlay Dialog.
using (RegistryKey hKey = Registry.LocalMachine.OpenSubKey(@"SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\AutoplayHandlers\EventHandlers\MTPMediaPlayerArrival", true))
{
try
{
hKey.DeleteValue("SgtlMtpAutoPlayHandler");
}
catch (Exception e)
{
Trace.WriteLine(e.Message);
}
}
}
_CancelAutoPlay -= capDelegate;
}
}
private bool RegisterCancelAutoPlay(CancelAutoPlayEventHandler capDelegate)
{
// Must be Windows XP or later
if (Environment.OSVersion.Version < new Version(5, 1))
{
return(false); // false means failed
}
if (CreateAutoPlayHandlerRegistryEntries())
{
System.Runtime.InteropServices.ComTypes.IRunningObjectTable objTbl;
if (NativeMethods.GetRunningObjectTable(0, out objTbl) == NativeMethods.S_OK)
{
///
/// Volume-based AutoPlay Cancelation
///
if (_CancelAutoPlayCookie == 0)
{
// Create the volume-based moniker that we'll put in the ROT
System.Runtime.InteropServices.ComTypes.IMoniker vbMoniker;
if (NativeMethods.CreateClassMoniker(ref _CLSID_QueryCancelAutoPlay, out vbMoniker) == NativeMethods.S_OK)
{
_CancelAutoPlayCookie = objTbl.Register(NativeMethods.ROTFLAGS_REGISTRATIONKEEPSALIVE, this, vbMoniker);
}
}
///
/// Non-Volume-based AutoPlay Cancelation
///
if (_HWEventHandlerCookie == 0)
{
// Create the non-volume-based moniker that we'll put in the ROT
System.Runtime.InteropServices.ComTypes.IMoniker nvbMoniker;
if (NativeMethods.CreateHardwareEventMoniker(ref _CLSID_HWEventHandler, "MTPMediaPlayerArrival", out nvbMoniker) == NativeMethods.S_OK)
{
_HWEventHandlerCookie = objTbl.Register(NativeMethods.ROTFLAGS_REGISTRATIONKEEPSALIVE | NativeMethods.ROTFLAGS_ALLOWANYCLIENT, this, nvbMoniker);
}
if (_HWEventHandlerCookie != 0)
{
// Add our do-nothing handler to the list of MTPMediaPlayerArrival handlers.
// Note this will have to be removed when we unregister for AutoPlay cancelation so the
// do-nothing handler does not show up as a choice in the AutoPlay Dialog.
Registry.SetValue(@"HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\AutoplayHandlers\EventHandlers\MTPMediaPlayerArrival", "SgtlMtpAutoPlayHandler", String.Empty);
}
}
} // if (NativeMethods.GetRunningObjectTable(0, out objTbl) == NativeMethods.S_OK)
}
if (_CancelAutoPlayCookie != 0 && _HWEventHandlerCookie != 0)
{
_CancelAutoPlay += capDelegate;
return(true);
}
else
{
return(false); // false means failed
}
}