using System;
using System.Drawing;
using System.Collections;
using System.ComponentModel;
using System.Windows.Forms;
using System.Data;
using VDSDKLib;

namespace Sharp
{
	public class CVirtualDriveHandler : VDSDKLib.IVirtualDriveHandler2
	{
		private byte[] m_buffer;

		public CVirtualDriveHandler(uint diskSize)
		{
			m_buffer = new byte[diskSize*1024*1024];
		}

		~CVirtualDriveHandler()
		{
			m_buffer = null;
		}

		public uint OnReadData(System.UInt64 Offset, uint Size,out System.Array Buffer)
		{
			byte[] buf = new byte[Size];
			System.Array.Copy(m_buffer,(int)Offset,buf,0,(int)Size);
			Buffer = buf;
			return Size;
		}

		public uint OnWriteData(System.UInt64 Offset, uint Size,ref System.Array Buffer)
		{
			System.Array.Copy((byte[])Buffer,0,m_buffer,(int)Offset, (int)Size);
			return Size;
		}
	}


	public class Form1 : System.Windows.Forms.Form
	{
		/// <summary>
		/// Required designer variable.
		/// </summary>
		private System.ComponentModel.Container components = null;

		public Form1()
		{
			InitializeComponent();
			CreateBtn.Enabled = true;
			DestroyBtn.Enabled = false;
			m_driveHandle = -1;
			m_pHandler = null;

			// initialize VDSDK
			m_pManager = new VDSDKLib.VirtualDrivesManagerClass();
			m_pManager.InitializeVDSDK();
		}

		~Form1()
		{
			// shutdown VDSDK
			m_pManager.ShutdownVDSDK(1);
		}

		protected override void Dispose( bool disposing )
		{
			if( disposing )
			{
				if (components != null) 
				{
					components.Dispose();
				}
			}
			base.Dispose( disposing );
		}

		#region Windows Form Designer generated code
		private void InitializeComponent()
		{
			this.CreateBtn = new System.Windows.Forms.Button();
			this.DestroyBtn = new System.Windows.Forms.Button();
			this.SuspendLayout();
			// 
			// CreateBtn
			// 
			this.CreateBtn.Location = new System.Drawing.Point(40, 160);
			this.CreateBtn.Name = "CreateBtn";
			this.CreateBtn.TabIndex = 0;
			this.CreateBtn.Text = "Create";
			this.CreateBtn.Click += new System.EventHandler(this.CreateBtn_click);
			// 
			// DestroyBtn
			// 
			this.DestroyBtn.Location = new System.Drawing.Point(136, 160);
			this.DestroyBtn.Name = "DestroyBtn";
			this.DestroyBtn.TabIndex = 0;
			this.DestroyBtn.Text = "Destroy";
			this.DestroyBtn.Click += new System.EventHandler(this.DestroyBtn_Click);
			// 
			// Form1
			// 
			this.AutoScaleBaseSize = new System.Drawing.Size(5, 13);
			this.ClientSize = new System.Drawing.Size(292, 273);
			this.Controls.Add(this.CreateBtn);
			this.Controls.Add(this.DestroyBtn);
			this.Name = "Form1";
			this.Text = "Form1";
			this.ResumeLayout(false);

		}
		#endregion

		[STAThread]
		static void Main() 
		{
			Application.Run(new Form1());
		}

		private System.Windows.Forms.Button CreateBtn;
		private System.Windows.Forms.Button DestroyBtn;

		// internal variables
		private CVirtualDriveHandler m_pHandler; // out virtual drive event handler
		private int m_driveHandle; // virtual drive handle
		private VDSDKLib.VirtualDrivesManagerClass m_pManager; // VDSDK manager

		private void CreateBtn_click(object sender, System.EventArgs e)
		{
			m_pHandler = new CVirtualDriveHandler(16);
			m_driveHandle = m_pManager.CreateVirtualDrive((byte)'Z',16,m_pHandler);
			if(m_driveHandle != -1)
			{
				CreateBtn.Enabled = false;
				DestroyBtn.Enabled = true;
			}
			else
			{
				m_pHandler = null;
			}
		}

		private void DestroyBtn_Click(object sender, System.EventArgs e)
		{
			if(m_driveHandle != -1)
			{
				m_pManager.DestroyVirtualDrive(m_driveHandle,1);
				m_pHandler = null;
				m_driveHandle = -1;

				CreateBtn.Enabled = true;
				DestroyBtn.Enabled = false;
			}
		}
	}
	
}