C#调用API

1，首先引入命名空间

 

using System.Net.Security;

using System.Runtime.InteropServices;

 

2，写入要调用的API的名字

        //调用API
        [DllImport("user32.dll", EntryPoint = "ShowWindow")]
        public static extern int ShowWindow(int hwnd, int nCmdShow);
        public const int SW_SHOW = 5; public const int SW_HIDE = 0;

        [DllImport("user32.dll", EntryPoint = "SystemParametersInfo")]
        private static extern int SystemParametersInfo(int uAction, int uParam, ref Rectangle