how to disable 'send to' in c#

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hi.

i want to make an anticopy program that can disable 'send to' in computer. when i try to run the program, the 'send to' is still exist. can you tell me how to disable the 'send to'..? this is the program code:

C#

private void sendto(string stat)
        {   // try and catch: cause window-xp use "Send To" and Vista,Window7 Use "SendTo"
            try
            {
                RegistryKey sendto =
                Registry.ClassesRoot.OpenSubKey("AllFilesystemObjects\\shellex\\ContextMenuHandlers\\SendTo", true);
                if (sendto != null)
                {
                    if (stat == "disable")
                    {
                        if (sendto != null)
                        {
                            sendto = null;
                        }
                        else
                        {
                            sendto.SetValue(null, "");
                        }
                    }
                    else
                    {
                        sendto.SetValue(null, "{7BA4C740-9E81-11CF-99D3-00AA004AE837}");
                    }
                }
            }
            catch
            {
                RegistryKey sendto = Registry.ClassesRoot.OpenSubKey("AllFilesystemObjects\\shellex\\ContextMenuHandlers\\Send To", true);
                if (sendto != null)
                {
                    if (stat == "disable")
                    {
                        if (sendto != null)
                        {
                            sendto = null;
                        }
                        else
                        {
                            sendto.SetValue(null, "");
                        }
                    }
                    else
                    {
                        sendto.SetValue(null, "{7BA4C740-9E81-11CF-99D3-00AA004AE837}");
                    }
                }
            }
        }

much appreciate for your help.

Posted 1-Aug-11 15:26pm

mrshh

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Comments

Sergey Alexandrovich Kryukov 1-Aug-11 22:44pm

If you disable any thinkable shell menu, it won't make a copy any harder. :-) Why bothering?
--SA

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Anthony Mushrow · Answer 1 · 2011-08-01T16:32:00

I don't know how you'd disable that context menu item but there are a few things I need to point out.

First, if your updating the registry you'll likely need to restart windows before the changes get picked up.
Second, the catch block is not a place where you can just try to run the same piece of code again, it is there for you to handle any errors, and in most situations you should really only catch the exceptions that you are able to handle.
Third, in your if statements you check if sendto is null. If it isn't you set it to null and if it's null already then you try to call a method on it, which is foolish. Ignoring the fact that because of the top level if statement we know that it will never be null at that point anyway which makes the chunk of code completely redundant.

EDIT: Also of course the reason your code isn't working could be because you never actually change the value of the registry key (assuming stat == "disable").

Perhaps something like this may fare a little better:

private void sendto(string stat)
{
    try
    {
        RegistryKey sendto = Registry.ClassesRoot.OpenSubKey("AllFilesystemObjects\\shellex\\ContextMenuHandlers\\SendTo", true);
        if(sendto == null)
        {
            //Try the other key
            sendto = Registry.ClassesRoot.OpenSubKey("AllFilesystemObjects\\shellex\\ContextMenuHandlers\\Send To", true);
        }

        if (sendto != null)
        {
            if (stat == "disable")
                sendto.SetValue(null, "");
            else
                sendto.SetValue(null, "{7BA4C740-9E81-11CF-99D3-00AA004AE837}");
        }
        else
            MessageBox.Show("Specified Registry key was not found", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
    }
    catch(SecurityException se)
    {
        MessageBox.Show("User does not have permission to edit the registry key", "Error", MessageBoxButtons.OK, MessageBoxIcon.Error);
    }
}