C Sharp钩子问题。。。请朋友进来帮帮忙

[Jave.Lin]

using System; 
using System.Collections.Generic; 
using System.Text; 
using System.Runtime.InteropServices; 
using System.Drawing; 
using System.Reflection; 
using System.Windows.Forms; 
using System.IO; 
using System.Diagnostics; 
namespace WindowsApplication4 
{ 
    public class KeyHook 
    { 
        private Form1 f1 = null; 
        public KeyHook(Form1 form) 
        { 
            Start(); 
            f1 = form; 
        } 

        ~KeyHook() 
        { 
            Stop(); 
        } 

        public const int WH_KEYBOARD_LL = 13; 
        public const int WM_KEYDOWN = 0x100; 

        private const int WM_SYSKEYDOWN = 0x104; 
        private const int WM_SYSKEYUP = 0x105; 

        public event KeyEventHandler KeyDown; 

        public event KeyEventHandler KeyUp; 

        public event KeyEventHandler KeyPress; 

        public static bool flag; 


        public delegate int HookProc(int nCode, Int32 wParam, IntPtr lParam); 

        public static int hKeyboardHook = 0; 
        HookProc KeyboardHookProcedure; 

        [StructLayout(LayoutKind.Sequential)] 
        public class POINT 
        { 
            public int x; 
            public int y; 
        } 

        [StructLayout(LayoutKind.Sequential)] 
        public class KeyboardHookStruct 
        { 
            public int vkCode; 

            public int scanCode; 

            public int flags; 

            public int time; 

            public int dwExtraInfo; 

        } 
        
        [DllImport("user32.dll")] 
        public static extern int SetWindowsHookEx(int idHook, HookProc lpfn, IntPtr hInstance, int threadId); 

        [DllImport("user32.dll")] 
        public static extern bool UnhookWindowsHookEx(int idHook); 

        [DllImport("user32.dll")] 
        public static extern int CallNextHookEx(int idHook, int nCode, Int32 wParam, IntPtr lParam); 
        
        public void Start() 
        { 
            //install hook 
            if (hKeyboardHook == 0) 
            { 
                KeyboardHookProcedure = new HookProc(KeyboardHookProc); 
                hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);             } 
        } 
        public void Stop() 
        { 
            if (hKeyboardHook != 0) 
            { 
                bool retKeyboard = UnhookWindowsHookEx(hKeyboardHook); 
                hKeyboardHook = 0; 
            } 
        } 

        public int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam) 
        { 

            int r = CallNextHookEx(hKeyboardHook, nCode, wParam, lParam); 
            // it was ok and someone listens to events 
            if ((nCode >= 0) && (KeyDown != null || KeyUp != null || KeyPress != null)) 
            { 

                KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct)); 
                if (KeyDown != null && (wParam == WM_KEYDOWN || wParam == WM_SYSKEYDOWN) || (wParam == WM_KEYDOWN && wParam == WM_SYSKEYDOWN)) 
                { 
                    //if ((wParam >= 'A' && wParam <= 'Z') || (wParam >= 'a' && wParam <= 'z') || (wParam >= '0' && wParam <= '9')) 
                    //{ 
                    //    return wParam; 
                    //    //Keys keyData = (Keys)MyKeyboardHookStruct.vkCode; 
                    //    //KeyEventArgs e = new KeyEventArgs(keyData); 
                    //    //f1.Text += e.KeyCode; 
                    //    //Console.WriteLine(e.KeyValue); 
                    //} 
                    ////return 1; 
                    return 1; 
                } 
            } 
            return r; 
        }  
    } 
} 

代码里。。。深蓝色的那个hKeyboardHook值。。。为啥老是0值。。。

也就是问。。。SetWindowsHookEx怎么老是返回0值的？

请朋友帮帮忙，感激不尽。

[pvgyetg]

友情UP

[Jave.Lin]

[color=#333399]hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0); [/color]

以上这句话是我在楼顶说的深蓝色语句...

因为我在Code下,颜色代码标志转不了...

hKeyboardHook = SetWindowsHookEx(WH_KEYBOARD_LL, KeyboardHookProcedure, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);

就是这句话的hKeyboardHook......我打了个断点测试了...老是返回是0值...

我就觉得奇怪了...我在VS2003下,运行 的是非0值,而我在VS2005运行就不是了...返回的就是0值...

有点感觉是VS版本问题...

还是说,是SetWindowsHookEx()的问题?

希望各位朋友帮忙一下...

谢谢...