需呼叫API函式

需在開頭引入名稱空間using System.Runtime.InteropServices;

獲取當前視窗控制代碼:GetForegroundWindow()

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

public static extern IntPtr GetForegroundWindow();

返回值型別是IntPtr,即為當前獲得焦點視窗的控制代碼

使用方法 : IntPtr myPtr=GetForegroundWindow();

獲取到該視窗控制代碼後,可以對該視窗進行操作.比如,關閉該視窗或在該視窗隱藏後,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 關閉視窗

1 正常大小顯示視窗

2 最小化視窗

3 最大化視窗

使用例項: ShowWindow(myPtr, 0);

獲取視窗大小及位置:

需要呼叫方法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; //最左座標

public int Top; //最上座標

public int Right; //最右座標

public int Bottom; //最下座標 }

示例:

InPtr awin = GetForegroundWindow(); //獲取當前視窗控制代碼

RECT rect = new RECT();

GetWindowRect(awin, ref rect);

int width = rc.Right - rc.Left; //視窗的寬度

int height = rc.Bottom - rc.Top; //視窗的高度

int x = rc.Left;

int y = rc.Top;