/// <summary>
/// 键盘钩子处理函数
/// </summary>
private int KeyboardHookProc(WH_CODE nCode, Int32 wParam, IntPtr lParam)
{
/*全局钩子应该这样设定
* KeyboardHookStruct MyKeyboardHookStruct = (KeyboardHookStruct)Marshal.PtrToStructure(lParam, typeof(KeyboardHookStruct));
*/
// 定义为线程钩子时，wParam的值是击打的按键，与Keys里的对应按键相同
if ((nCode == (int)HC_CODE.HC_ACTION) && (this.OnKeyDown != null || this.OnKeyUp != null))
{
mKeyData = (Keys)wParam;
KeyEventArgs keyEvent = new KeyEventArgs(mKeyData);
//这里简单的通过lParam的值的正负情况与按键的状态相关联
if (lParam.ToInt32() > 0 && this.OnKeyDown != null)
{
this.OnKeyDown(this, keyEvent);
}
else if (lParam.ToInt32() < 0 && this.OnKeyUp != null)
{
this.OnKeyUp(this, keyEvent);
}
}
return(CallNextHookEx(this.mKetboardHook, nCode, wParam, lParam));
}
public static extern IntPtr SetWindowsHookEx(WH_CODE idHook, HookProc lpfn, IntPtr pInstance, uint threadId);
public static extern int CallNextHookEx(IntPtr pHookHandle, WH_CODE nCodem, Int32 wParam, IntPtr lParam);
