Esempio n. 1
0
        private List <Keys> preKeysList = new List <Keys>();//存放被按下的控制键,用来生成具体的键

        private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)

        {
            //如果该消息被丢弃(nCode<0)或者没有事件绑定处理程序则不会触发事件

            if ((nCode >= 0) && (OnKeyDownEvent != null || OnKeyUpEvent != null || OnKeyPressEvent != null))

            {
                Win32Api.KeyboardHookStruct KeyDataFromHook = (Win32Api.KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(Win32Api.KeyboardHookStruct));

                Keys keyData = (Keys)KeyDataFromHook.vkCode;

                //按下控制键

                if ((OnKeyDownEvent != null || OnKeyPressEvent != null) && (wParam == Win32Api.WM_KEYDOWN || wParam == Win32Api.WM_SYSKEYDOWN))

                {
                    if (IsCtrlAltShiftKeys(keyData) && preKeysList.IndexOf(keyData) == -1)

                    {
                        preKeysList.Add(keyData);
                    }
                }

                //WM_KEYDOWN和WM_SYSKEYDOWN消息,将会引发OnKeyDownEvent事件

                if (OnKeyDownEvent != null && (wParam == Win32Api.WM_KEYDOWN || wParam == Win32Api.WM_SYSKEYDOWN))

                {
                    KeyEventArgs e = new KeyEventArgs(GetDownKeys(keyData));



                    OnKeyDownEvent(this, e);
                }

                //WM_KEYDOWN消息将引发OnKeyPressEvent

                if (OnKeyPressEvent != null && wParam == Win32Api.WM_KEYDOWN)

                {
                    byte[] keyState = new byte[256];

                    Win32Api.GetKeyboardState(keyState);

                    byte[] inBuffer = new byte[2];

                    if (Win32Api.ToAscii(KeyDataFromHook.vkCode, KeyDataFromHook.scanCode, keyState, inBuffer, KeyDataFromHook.flags) == 1)

                    {
                        KeyPressEventArgs e = new KeyPressEventArgs((char)inBuffer[0]);

                        OnKeyPressEvent(this, e);
                    }
                }

                //松开控制键

                if ((OnKeyDownEvent != null || OnKeyPressEvent != null) && (wParam == Win32Api.WM_KEYUP || wParam == Win32Api.WM_SYSKEYUP))

                {
                    if (IsCtrlAltShiftKeys(keyData))

                    {
                        for (int i = preKeysList.Count - 1; i >= 0; i--)

                        {
                            if (preKeysList[i] == keyData)
                            {
                                preKeysList.RemoveAt(i);
                            }
                        }
                    }
                }

                //WM_KEYUP和WM_SYSKEYUP消息,将引发OnKeyUpEvent事件

                if (OnKeyUpEvent != null && (wParam == Win32Api.WM_KEYUP || wParam == Win32Api.WM_SYSKEYUP))

                {
                    KeyEventArgs e = new KeyEventArgs(GetDownKeys(keyData));

                    OnKeyUpEvent(this, e);
                }
            }

            return(Win32Api.CallNextHookEx(hHook, nCode, wParam, lParam));
        }
Esempio n. 2
0
        public void UnHook()

        {
            Win32Api.UnhookWindowsHookEx(hHook);
        }