c# - 将代码放在外部 dll 中时，SetWindowsHookEx 不起作用

Question

HI i have a following code that reads mouse event

using System;
using System.Drawing;
using System.Reflection;
using System.Runtime.InteropServices;
    public enum MouseKeyType
    {
        MouseMoveOnly=512,
        MouseLeftKeyDown=513,
        MouseLeftKeyup=514,
        MouseRightKeyDown = 516,
        MouseRightKeyup = 517,
        MouseMiddleKeyDown = 519,
        MouseMiddleKeyup = 520,
        MouseScroll=522
    }
    [StructLayout(LayoutKind.Sequential)]
    public class MouseEventData
    {
        public Point point;
        private int mouseData;
        private int flags;
        public int time;
        //public int dwExtraInfo;
        public bool IsScrollUp
        {
            get
            {
                return mouseData > -1;
            }
        }
        public MouseKeyType mouseKeyType;
    }
    public class gc
    {
        // Event
        public delegate void gcMouseEvents(object source, MouseEventData e);
        public event gcMouseEvents gcevent;
        // WIN32 hook
        [DllImport("user32.dll", CharSet = CharSet.Auto, CallingConvention = CallingConvention.StdCall, SetLastError = true)]
        private static extern int SetWindowsHookEx( int idHook, HookProc lpfn,  IntPtr hMod, int dwThreadId);

        //just a delegate to simplify the type of 
        private delegate int HookProc(int nCode,int wParam, IntPtr lParam);
        private HookProc _hookCallback;
        public gc()
        {
            _hookCallback = new HookProc((x,y,z)=> 
            {
                //string output = JsonConvert.SerializeObject(ptr);
                //Console.WriteLine(output);
                if (gcevent!=null)
                {
                    MouseEventData ptr = (MouseEventData)Marshal.PtrToStructure(z, typeof(MouseEventData));
                    ptr.mouseKeyType = (MouseKeyType)y;
                    gcevent(this, ptr);
                }
                return 0;
            });

              SetWindowsHookEx(
                14,
                _hookCallback,
                Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]),
                0);

        }
    }

当代码放置在该项目中时，这似乎在表单应用程序中工作正常。但是当代码被放置在控制台库中并添加了一个引用然后它就不起作用了..我尝试将dll添加到windows窗体等并使用静态等但是当它放置在dll中时似乎没有任何工作

标签： c#.netwinforms