屏幕截图需要当前使用'已启动的应用程序

Question

需要知道当前打开的应用程序：所有应用程序在任务管理器中。

这是为了屏幕截图，所以如果可能的话，我需要一些访问这些应用程序在屏幕上的位置。

使用.NET C＃Expression Encoder的

Answer 1

有official documentation其中的窗口出现在任务栏中。

无论如何，像这样的东西应该通过一般的想法。您现在可以自行排列详细信息，以了解您的目标。

using System; 
using System.Runtime.InteropServices; 
using System.Text; 

public delegate bool CallBack(IntPtr hWnd, IntPtr lParam); 

public class EnumTopLevelWindows { 

    [DllImport("user32", SetLastError=true)] 
    private static extern int EnumWindows(CallBack x, IntPtr y); 

    [DllImport("user32.dll", SetLastError = true)] 
    static extern IntPtr GetParent(IntPtr hWnd); 

    [DllImport("user32.dll", EntryPoint = "GetWindowLong", SetLastError = true)] 
    private static extern IntPtr GetWindowLongPtr(IntPtr hWnd, int nIndex); 

    [DllImport("user32.dll", SetLastError = true)] 
    [return: MarshalAs(UnmanagedType.Bool)] 
    private static extern bool IsWindowVisible(IntPtr hWnd); 

    [DllImport("user32.dll", SetLastError = true, CharSet = CharSet.Auto)] 
    static extern int GetWindowTextLength(IntPtr hWnd); 

    [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)] 
    static extern int GetWindowText(IntPtr hWnd, StringBuilder lpString, int nMaxCount); 

    public static string GetText(IntPtr hWnd) 
    { 
     // Allocate correct string length first 
     int length = GetWindowTextLength(hWnd); 
     StringBuilder sb = new StringBuilder(length + 1); 
     GetWindowText(hWnd, sb, sb.Capacity); 
     return sb.ToString(); 
    } 

    private const int GWL_STYLE = -16; 
    private const int WS_EX_APPWINDOW = 0x00040000; 

    public static void Main() 
    { 
     CallBack myCallBack = new CallBack(EnumTopLevelWindows.Report); 
     EnumWindows(myCallBack, IntPtr.Zero); 
    } 

    public static bool Report(IntPtr hWnd, IntPtr lParam) 
    { 
     if (GetParent(hWnd) == IntPtr.Zero) 
     { 
      //window is a non-owned top level window 
      if (IsWindowVisible(hWnd)) 
      { 
       //window is visible 
       int style = GetWindowLongPtr(hWnd, GWL_STYLE).ToInt32(); 
       if ((style & WS_EX_APPWINDOW) == WS_EX_APPWINDOW) 
       { 
        //window has WS_EX_APPWINDOW style 
        Console.WriteLine(GetText(hWnd)); 
       } 
      } 
     } 
     return true; 
    } 
} 

Answer 2

您可以使用管理System.Diagnostic.Processes类：

Process[] running = Process.GetProcesses(); 

foreach(Process p in running) 
    Console.WriteLine(p.ProcessName);