Create illegal folders

irProject · December 7th, 2009, 03:16 AM

Hello
in Visual Basic 6.0 by mkdir function we could create illegal folders like this:
mkdir "\\.\C:\CON"
I used this method to create a program that protect usb drive against some viruses
mkdir "I:\AUTORUN.INF"
mkdir "\\.\I:\AUTORUN.INF\CON"
then autorun.inf folder can't be removed

I'm trying to write this code using C#, but some available functions like Directory.CreateFolder("\\.\I:\CON"); does not work and throws an exception
how can i get help?

irProject · December 13th, 2009, 06:39 AM

as you know mkdir uses a function of system to create new directory. so we can call an api function to do this. but what is the name of specific api function?

irProject · December 13th, 2009, 06:52 AM

api function name is CreateDirectory
but i will test to know does it work? ( to make illegal folder )

irProject · December 13th, 2009, 07:27 AM

I found the answer

Code:

class Program
{
	static void Main(string[] args)
	{
		SECURITY_ATTRIBUTES lpSA = new SECURITY_ATTRIBUTES();
		lpSA.nLength = 24;
		if (CreateDirectory(@"\\.\c:\con", ref lpSA) != 0)
		{
			Console.WriteLine("OK");
		}
		else
			Console.WriteLine("NO");
		Console.ReadLine();
	}

	struct SECURITY_ATTRIBUTES
	{
		public long nLength;
		public long lpSecurityDescriptor;
		public long bInheritHandle;
	}

	[DllImport("kernel32.dll")]
	private static extern long CreateDirectory(string lpPathName, ref SECURITY_ATTRIBUTES lpSecurityAttributes);
}

thanks to all your answers!