windows编程 数据类型 和C# 数据类型的转换，求帮助

   // ms-help://MS.VSCC.v80/MS.MSDN.v80/MS.WIN32COM.v10.en/dllproc/base/createdesktop.htm
    [DllImport("user32.dll", EntryPoint="CreateDesktop", CharSet=CharSet.Unicode, SetLastError=true)]
    public static extern IntPtr CreateDesktop(
                    [MarshalAs(UnmanagedType.LPWStr)] string desktopName,
                    [MarshalAs(UnmanagedType.LPWStr)] string device, // must be null.
                    [MarshalAs(UnmanagedType.LPWStr)] string deviceMode, // must be null,
                    [MarshalAs(UnmanagedType.U4)] int flags,  // use 0
                    [MarshalAs(UnmanagedType.U4)] ACCESS_MASK accessMask,
                    [MarshalAs(UnmanagedType.LPStruct)] SECURITY_ATTRIBUTES attributes);


    // ms-help://MS.VSCC.v80/MS.MSDN.v80/MS.WIN32COM.v10.en/dllproc/base/closedesktop.htm
    [DllImport("user32.dll", EntryPoint="CloseDesktop", CharSet =  CharSet.Unicode, SetLastError = true)]
    [return: MarshalAs(UnmanagedType.Bool)]
    public static extern bool CloseDesktop(IntPtr handle);


[Flags]
    internal enum ACCESS_MASK : uint
    {
    DESKTOP_NONE        = 0,
    DESKTOP_READOBJECTS     = 0x0001,
    DESKTOP_CREATEWINDOW    = 0x0002,
    DESKTOP_CREATEMENU      = 0x0004,
    DESKTOP_HOOKCONTROL     = 0x0008,
    DESKTOP_JOURNALRECORD       = 0x0010,
    DESKTOP_JOURNALPLAYBACK     = 0x0020,
    DESKTOP_ENUMERATE       = 0x0040,
    DESKTOP_WRITEOBJECTS    = 0x0080,
    DESKTOP_SWITCHDESKTOP       = 0x0100,

    GENERIC_ALL         = ( DESKTOP_READOBJECTS | DESKTOP_CREATEWINDOW | DESKTOP_CREATEMENU |
                    DESKTOP_HOOKCONTROL | DESKTOP_JOURNALRECORD | DESKTOP_JOURNALPLAYBACK |
                    DESKTOP_ENUMERATE | DESKTOP_WRITEOBJECTS | DESKTOP_SWITCHDESKTOP |
                    STANDARD_ACCESS.STANDARD_RIGHTS_REQUIRED),
    }
    [StructLayout(LayoutKind.Sequential)]
public struct SECURITY_ATTRIBUTES
{
    public int nLength;
    public unsafe byte* lpSecurityDescriptor;//或者 public IntPtr lpSecurityDescriptor;如果你不想开启/unsave开关的话
    public int bInheritHandle;
}

API用法我都是在这个网站上查的

pinvoke.net: CreateDesktop (user32)

http://www.pinvoke.net/default.aspx/user32/CreateDesktop.html

[DllImport("user32", EntryPoint = "CreateDesktopW", CharSet = CharSet.Unicode, SetLastError = true)]
public static extern IntPtr CreateDesktop(string lpszDesktop, IntPtr lpszDevice, IntPtr pDevmode, int dwFlags,
int dwDesiredAccess, IntPtr lpsa);