C#捕获鼠标键盘未操作的时间长度

代码
 1 //添加引用
 2  using System.Runtime.InteropServices;
 3 
 4  //创建结构体用于返回捕获时间
 5 [StructLayout(LayoutKind.Sequential)]
 6     struct LASTINPUTINFO
 7     {
 8         //设置结构体块容量
 9         [MarshalAs(UnmanagedType.U4)]
10         public int cbSize;
11         
12         //捕获的时间
13         [MarshalAs(UnmanagedType.U4)]
14         public uint dwTime;
15     }
16 
17 //引用系统API
18 [DllImport("user32.dll")]
19         private static extern bool GetLastInputInfo(ref LASTINPUTINFO plii);
20         private static long GetLastInputTime()
21         {
22             LASTINPUTINFO vLastInputInfo = new LASTINPUTINFO();
23             vLastInputInfo.cbSize = Marshal.SizeOf(vLastInputInfo);
24             
25              //捕获时间
26             if (!GetLastInputInfo(ref vLastInputInfo)) return 0;
27             return Environment.TickCount - (long)vLastInputInfo.dwTime;
28         }