需調用API函數

需在開頭引入命名空間 using System.Runtime.InteropServices;

獲取當前窗口句柄:GetForegroundWindow()

[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]

public static extern IntPtr GetForegroundWindow();

返回值類型是IntPtr,即為當前獲得焦點窗口的句柄

使用方法 : IntPtr myPtr=GetForegroundWindow();

獲取到該窗口句柄后,可以對該窗口進行操作.比如,關閉該窗口或在該窗口隱藏后,使其顯示

[DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]

public static extern int ShowWindow(IntPtr hwnd, int nCmdShow);

其中ShowWindow(IntPtr hwnd, int nCmdShow);

nCmdShow的含義

0 關閉窗口

1 正常大小顯示窗口

2 最小化窗口

3 最大化窗口

使用實例: ShowWindow(myPtr, 0);

獲取窗口大小及位置:

需要調用方法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; //最左坐標

public int Top; //最上坐標

public int Right; //最右坐標

public int Bottom; //最下坐標 }

示例:

InPtr awin = GetForegroundWindow(); //獲取當前窗口句柄

RECT rect = new RECT();

GetWindowRect(awin, ref rect);

int width = rc.Right - rc.Left; //窗口的寬度

int height = rc.Bottom - rc.Top; //窗口的高度

int x = rc.Left;

int y = rc.Top;