通过进程ID获取窗口句柄(微软)

最新推荐文章于 2018-10-30 11:18:01 发布

转载最新推荐文章于 2018-10-30 11:18:01 发布 · 580 阅读

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CC 4.0 BY-SA版权

原文链接：http://www.cnblogs.com/ghypnus/archive/2012/03/21/2410819.html

文章标签：

#python #c#

本文介绍了一个名为MyProcess的C#类，该类提供了一种方法来获取指定进程ID的主窗口句柄。通过枚举窗口并检查每个窗口是否属于指定的进程ID，并判断其是否为主窗口，最终确定并返回主窗口的句柄。

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View Code

public class MyProcess
    {
private bool haveMainWindow = false;
private IntPtr mainWindowHandle = IntPtr.Zero;
private int processId = 0;

private delegate bool EnumThreadWindowsCallback(IntPtr hWnd, IntPtr lParam);

public IntPtr GetMainWindowHandle(int processId)
        {
if (!this.haveMainWindow)
            {
this.mainWindowHandle = IntPtr.Zero;
this.processId = processId;
                EnumThreadWindowsCallback callback = new EnumThreadWindowsCallback(this.EnumWindowsCallback);
                EnumWindows(callback, IntPtr.Zero);
                GC.KeepAlive(callback);

this.haveMainWindow = true;
            }
return this.mainWindowHandle;
        }

private bool EnumWindowsCallback(IntPtr handle, IntPtr extraParameter)
        {
int num;
            GetWindowThreadProcessId(new HandleRef(this, handle), out num);
if ((num == this.processId) && this.IsMainWindow(handle))
            {
this.mainWindowHandle = handle;
return false;
            }
return true;
        }

private bool IsMainWindow(IntPtr handle)
        {
return (!(GetWindow(new HandleRef(this, handle), 4) != IntPtr.Zero) && IsWindowVisible(new HandleRef(this, handle)));
        }

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern bool EnumWindows(EnumThreadWindowsCallback callback, IntPtr extraData);

        [DllImport("user32.dll", CharSet = CharSet.Auto, SetLastError = true)]
public static extern int GetWindowThreadProcessId(HandleRef handle, out int processId);

        [DllImport("user32.dll", CharSet = CharSet.Auto, ExactSpelling = true)]
public static extern IntPtr GetWindow(HandleRef hWnd, int uCmd);

        [DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern bool IsWindowVisible(HandleRef hWnd);
    }