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在C#中使用热键隐含窗口


在 C#中使用热键隐含窗口 中使用热键隐含窗口
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我们曾经想过能够在我们的计算机上将窗口隐蔽起来,不想被从身边走过的老板看见.尝试便捷的 W indows 隐藏并定义热键来控制它们.下面我们将演示如何通过热键,我们将会用到 DllImports of Win3 2 API,CallBacks/Delegates,定制事件与事件的句柄.

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

namespace WindowHider { /// <summary> /// Object used to control a Windows Form. /// </summary> public class Window { /// <summary> /// Win32 API Imports /// </summary> [DllImport("user32.dll")] private static extern bool ShowWindowAsync(IntPtr hWnd, int nCmdShow); [DllImport("user32.dll")] private static extern bool SetForegroundWindow(IntPtr hWnd); [DllImport("user32.dll")] private static extern bool IsIconic(IntPtr hWnd); [DllImport("user32.dll")] private static extern

bool IsZoomed(IntPtr hWnd); [DllImport("user32.dll")] private static extern IntPtr GetForegroundWindow(); [DllImport("user32.dll")] private static extern IntPtr GetWindowThreadProcessId(IntPtr hWnd, IntPtr ProcessId); [DllImport("user32.dll")] private static extern IntPtr AttachThreadInput(IntPtr idAttach, IntPtr idAttachTo, int fAttach);

/// <summary> /// Win32 API Constants for ShowWindowAsync() /// </summary> private const int SW_HIDE = 0; private const int SW_SHOWNORMAL = 1; private const int SW_SHOWMINIMIZED = 2; private const int SW_SHOWMAXIMIZED = 3; private const int SW_SHOWNOACTIVATE = 4; private const int SW_RESTORE = 9; private const int SW_SHOWDEFAULT = 10;

/// <summary> /// Private Fields /// </summary> private IntPtr m_hWnd; private string m_Title; private bool m_Visible = true; private string m_Process; private bool m_WasMax = false;

/// <summary> /// Window Object's Public Properties /// </summary> public IntPtr hWnd { get{return m_hWnd;} } public string Title { get{return m_Title;} } public string Process { get{return m_Process;} }

/// <summary> /// Sets this Window Object's visibility /// </summary> public bool Visible { get{return m_Visible;} set { //show the window if(value == true) { if(m_WasMax) { if(ShowWindowAsync(m_hWnd,SW_SHOWMAXIMIZED)) m_Visible = true; } else { if(ShowWindowAsync(m_hWnd,SW_SHOWNORMAL)) m_Visible = true; } } //hide the window if(value == false) { m_WasMax = IsZoomed(m_hWnd); if(ShowWindowAsync(m_hWnd,SW_HIDE)) m_Visible = false; } } }

/// <summary> /// Constructs a Window Object /// </summary> /// <param name="Title">Title Caption</param> /// <param name="hWnd">Handle</param> /// <param name="Process">Owning Process</param> public Window(string Title, IntPtr hWnd, string Process) { m_Title = Title; m_hWnd = hWnd;

m_Process = Process; }

//Override ToString() public override string ToString() { //return the title if it has one, if not return the process name if (m_Title.Length > 0) { return m_Title; } else { return m_Process; } }

/// <summary> /// Sets focus to this Window Object /// </summary> public void Activate() { if(m_hWnd == GetForegroundWindow()) return;

IntPtr ThreadID1 = GetWindowThreadProcessId(GetForegroundWindow(), IntPtr.Zero); IntPtr ThreadID2 = GetWindowThreadProcessId(m_hWnd,IntPtr.Zero);

if (ThreadID1 != ThreadID2) { AttachThreadInput(ThreadID1,ThreadID2,1); SetForegroundWindow(m_hWnd); AttachThreadInput(ThreadID1,ThreadID2,0); } else { SetForegroundWindow(m_hWnd); }

if (IsIconic(m_hWnd)) { ShowWindowAsync(m_hWnd,SW_RESTORE);

} else { ShowWindowAsync(m_hWnd,SW_SHOWNORMAL); } } }

/// <summary> /// Collection used to enumerate Window Objects /// </summary> public class Windows : IEnumerable, IEnumerator { /// <summary> /// Win32 API Imports /// </summary> [DllImport("user32.dll")] private static extern int GetWindowText(int hWnd, StringBuilder title, int size); [DllImport("user32.dll")] private static extern int GetWindowModuleFileName(int hWnd, StringBuilder title, int size); [DllImport("user32.dll")] private static extern int EnumWindows(EnumWindowsProc ewp, int lParam); [DllImport("user32.dll")] private static extern bool IsWindowVisible(int hWnd);

//delegate used for EnumWindows() callback function public delegate bool EnumWindowsProc(int hWnd, int lParam);

private int m_Position = -1; // holds current index of wndArray, // necessary for IEnumerable

ArrayList wndArray = new ArrayList(); //array of windows

//Object's private fields private bool m_invisible = false; private bool m_notitle = false;

/// <summary> /// Collection Constructor with additional options /// </summary> /// <param name="Invisible">Include invisible Windows</param> /// <param name="Untitled">Include untitled Windows</param> public Windows(bool Invisible, bool Untitled)

{ m_invisible = Invisible; m_notitle = Untitled;

//Declare a callback delegate for EnumWindows() API call EnumWindowsProc ewp = new EnumWindowsProc(EvalWindow); //Enumerate all Windows EnumWindows(ewp, 0); } /// <summary> /// Collection Constructor /// </summary> public Windows() { //Declare a callback delegate for EnumWindows() API call EnumWindowsProc ewp = new EnumWindowsProc(EvalWindow); //Enumerate all Windows EnumWindows(ewp, 0); } //EnumWindows CALLBACK function private bool EvalWindow(int hWnd, int lParam) { if (m_invisible == false && !IsWindowVisible(hWnd)) return(true);

StringBuilder title = new StringBuilder(256); StringBuilder module = new StringBuilder(256);

GetWindowModuleFileName(hWnd, module, 256); GetWindowText(hWnd, title, 256);

if (m_notitle == false && title.Length == 0) return(true);

wndArray.Add(new Window(title.ToString(), (IntPtr)hWnd, module.ToString()));

return(true); }

//implement IEnumerable public IEnumerator GetEnumerator() {

return (IEnumerator)this; } //implement IEnumerator public bool MoveNext() { m_Position++; if (m_Position < wndArray.Count) { return true; } else { return false; } } public void Reset() { m_Position = -1; } public object Current { get { return wndArray[m_Position]; } } } }

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