c#对当前窗口进行关闭等操作

需调用API函数

需在开头引入命名空间

using System.Runtime.InteropServices;

获取当前窗口句柄:GetForegroundWindow()

[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
public static extern IntPtr GetForegroundWindow();

返回值类型是IntPtr,即为当前获得焦点窗口的句柄

使用方法 :   IntPtr myPtr=GetForegroundWindow();

获取到该窗口句柄后,可以对该窗口进行操作.比如,关闭该窗口或在该窗口隐藏后,使其显示

[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
public static extern int ShowWindow(IntPtr hwnd, int nCmdShow);

nCmdShow的含义

0    关闭窗口

1    正常大小显示窗口

2    最小化窗口

3    最大化窗口

使用实例:    ShowWindow(myPtr, 0);

获取窗口大小及位置:需要调用方法GetWindowRect(IntPtr hWnd, ref RECT lpRect)

        [DllImport("user32.dll")]
        [return: MarshalAs(UnmanagedType.Bool)]
        static extern bool GetWindowRect(IntPtr hWnd, ref RECT lpRect);
 
        [StructLayout(LayoutKind.Sequential)]
        public struct RECT
        {
            public int Left;                             //最左坐标
            public int Top;                             //最上坐标
            public int Right;                           //最右坐标
            public int Bottom;                        //最下坐标
        }

示例:

                    InPtr awin = GetForegroundWindow();    //获取当前窗口句柄
                    RECT rect = new RECT();
                    GetWindowRect(awin, ref rect);
                   int width = rc.Right - rc.Left;                        //窗口的宽度
                   int height = rc.Bottom - rc.Top;                   //窗口的高度
                    int x = rc.Left;                                              
                    int y = rc.Top;