/// <summary> 键盘钩子处理函数
/// </summary>
private int KeyboardHookProc(int nCode, Int32 wParam, IntPtr lParam)
{
//为 2 ，直接返回，不响应键盘事件
if (flags == HookType.Keyboard || flags == HookType.All)
{
}
else
{
return(Hocy_Hook.CallNextHookEx(this.m_pKeyboardHook, nCode, wParam, lParam));
}
bool handled = false;
//it was ok and someone listens to events
if ((nCode >= 0) && (this.OnKeyDown != null || this.OnKeyUp != null || this.OnKeyPress != null))
{
//read structure KeyboardHookStruct at lParam
KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct));
//raise KeyDown
if (this.OnKeyDown != null && (wParam == (int)WM_KEYBOARD.WM_KEYDOWN || wParam == (int)WM_KEYBOARD.WM_SYSKEYDOWN))
{
Keys keyData = (Keys)MyKeyboardHookStruct.VKCode;
KeyEventArgs e = new KeyEventArgs(keyData);
this.OnKeyDown(this, e);
handled = handled || e.Handled;
}
// raise KeyPress
if (this.OnKeyPress != null && wParam == (int)WM_KEYBOARD.WM_KEYDOWN)
{
bool isDownShift, isDownCapslock;
try
{
isDownShift = ((Hocy_Hook.GetKeyStates(VK_SHIFT) & 0x80) == 0x80 ? true : false);
isDownCapslock = (Hocy_Hook.GetKeyStates(VK_CAPITAL) != 0 ? true : false);
}
catch
{
isDownCapslock = false;
isDownShift = false;
}
byte[] keyState = new byte[256];
Hocy_Hook.GetKeyboardState(keyState);
byte[] inBuffer = new byte[2];
if (Hocy_Hook.ToAscii(MyKeyboardHookStruct.VKCode,
MyKeyboardHookStruct.ScanCode,
keyState,
inBuffer,
MyKeyboardHookStruct.Flags) == 1)
{
char key = (char)inBuffer[0];
if ((isDownCapslock ^ isDownShift) && Char.IsLetter(key))
{
key = Char.ToUpper(key);
}
KeyPressEventArgs e = new KeyPressEventArgs(key);
this.OnKeyPress(this, e);
handled = handled || e.Handled;
}
}
// raise KeyUp
if (this.OnKeyUp != null && (wParam == (int)WM_KEYBOARD.WM_KEYUP || wParam == (int)WM_KEYBOARD.WM_SYSKEYUP))
{
Keys keyData = (Keys)MyKeyboardHookStruct.VKCode;
KeyEventArgs e = new KeyEventArgs(keyData);
this.OnKeyUp(this, e);
handled = handled || e.Handled;
}
}
//handled 为true, 则其他程序无法接受到键盘事件
if (handled)
{
return(1);
}
else
{
return(Hocy_Hook.CallNextHookEx(this.m_pKeyboardHook, nCode, wParam, lParam));
}
}
/// <summary> 钩子类,实现 键盘和鼠标的钩子
/// </summary>
public Hocy_Hook()
{
Hocy_Hook.GetKeyboardState(this.m_KeyState);
}