AutoCAD 剪贴板格式的 .net 声明

结构体声明

  [StructLayout(LayoutKind.Sequential)]
  struct Rect
  {
    public int left;
    public int top;
    public int right;
    public int bottom;
  };

  [StructLayout(LayoutKind.Sequential, Pack=8)]
  struct Point3D
  {
    public double x;
    public double y;
    public double z;
  };

  [StructLayout(LayoutKind.Sequential, Pack=8, CharSet = CharSet.Unicode)]
  struct ClipboardInfo
  {
  	[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
    public string szTempFile;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 260)]
    public string szSourceFile;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 4)]
    public string szSignature;
    public int nFlags;
    public Point3D dptInsert;
    public Rect rectGDI;
    public IntPtr mpView;
    public int dwThreadId;
    public int nLen;
    public int nType;
    [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 1)]
    public string chData;
  };

  class NativeMethods
  {
    [DllImport("user32.dll")]
    public static extern bool OpenClipboard(IntPtr hWndNewOwner);
    [DllImport("user32.dll")]
    public static extern bool CloseClipboard();
    [DllImport("user32.dll")]
    public static extern IntPtr GetClipboardData(uint uFormat);
    [DllImport("user32.dll")]
    public static extern uint RegisterClipboardFormat(string lpszFormat);
    [DllImport("kernel32.dll")]
    public static extern IntPtr GlobalLock(IntPtr hMem);
    [DllImport("kernel32.dll")]
    public static extern bool GlobalUnlock(IntPtr hMem);
  };

使用:

    static void showClipboard(StringBuilder sb)
    {
    	uint cf = NativeMethods.RegisterClipboardFormat("AutoCAD.r22");
			if (NativeMethods.OpenClipboard(IntPtr.Zero)) {
			  IntPtr data = NativeMethods.GetClipboardData(cf);
			  IntPtr ptr = NativeMethods.GlobalLock(data);
			  ClipboardInfo ci = (ClipboardInfo)Marshal.PtrToStructure(ptr,
			    typeof(ClipboardInfo));
			  sb.AppendLine();
			  sb.AppendLine(string.Format("szTempFile={0}", ci.szTempFile));
			  sb.AppendLine(string.Format("dptInsert: {0}, {1}, {2}", ci.dptInsert.x, ci.dptInsert.y, ci.dptInsert.z));
			  NativeMethods.GlobalUnlock(data);
			  NativeMethods.CloseClipboard();
		  }
		}