public bool UnInstallHook()
{
bool result = true;
if (this.m_pKeyboardHook != IntPtr.Zero)
{
result = (APIWrapper.UnhookWindowsHookEx(this.m_pKeyboardHook) && result);
this.m_pKeyboardHook = IntPtr.Zero;
}
return(result);
}
/// <summary>
/// 键盘钩子处理函数
/// </summary>
/// <remarks>此版本的键盘事件处理不是很好,还有待修正.</remarks>
private int LowLevelKeyboardProc(int nCode, Int32 wParam, IntPtr lParam)
{
if (nCode == 0)
{
//获得信息
KeyboardLLHookStruct KeyboardInfo =
(KeyboardLLHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardLLHookStruct));
uint VKCode = KeyboardInfo.VKCode;
if (this.OnKeyDown != null && (wParam == (int)enmKeyboardMessageType.WM_SYSKEYDOWN ||
wParam == (int)enmKeyboardMessageType.WM_KEYDOWN))
{
Keys keyData = (Keys)KeyboardInfo.VKCode;
KeyEventArgs keyEvent = new KeyEventArgs(keyData);
this.OnKeyDown(this, keyEvent);
}
if (this.OnKeyPress != null && wParam == (Int32)enmKeyboardMessageType.WM_KEYUP)
{
byte[] inBuffer = new byte[2];
/*
* 当ToAscii返回1个字符表示为按键，
* 为0表示转换失败
* 为2表示转换了2个字符，在KeyPressEventArgs中只有一个Char信息，所以此中情况将忽略。
* 一般在特殊键盘输入（如德语、法语等的注音）时发生。
*/
if (APIWrapper.ToAscii(KeyboardInfo.VKCode,
KeyboardInfo.ScanCode,
this.m_KeyState,
inBuffer,
KeyboardInfo.Flags) == 1)
{
KeyPressEventArgs keyPressEvent = new KeyPressEventArgs((char)inBuffer[0]);
this.OnKeyPress(this, keyPressEvent);
}
}
if (this.OnKeyUp != null && (wParam == (Int32)enmKeyboardMessageType.WM_KEYUP ||
wParam == (Int32)enmKeyboardMessageType.WM_SYSKEYUP))
{
Keys keyData = (Keys)KeyboardInfo.VKCode;
KeyEventArgs keyEvent = new KeyEventArgs(keyData);
this.OnKeyUp(this, keyEvent);
}
}
return(APIWrapper.CallNextHookEx(this.m_pKeyboardHook, nCode, wParam, lParam));
}
public bool InstallHook()
{
IntPtr pInstance = Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().ManifestModule);
if (this.m_pKeyboardHook == IntPtr.Zero)
{
this.m_KeyboardHookProcedure = new HookProc(this.LowLevelKeyboardProc);
this.m_pKeyboardHook = APIWrapper.SetWindowsHookEx(enmHookType.WH_KEYBOARD_LL,
this.m_KeyboardHookProcedure, pInstance, 0);
if (this.m_pKeyboardHook == IntPtr.Zero)
{
int nErrCode = Marshal.GetLastWin32Error();
this.UnInstallHook();
return(false);
}
}
return(true);
}
public Hook()
{
APIWrapper.GetKeyboardState(this.m_KeyState);
}
