通过其进程名称取消隐藏进程？

Question

前一段时间我写了一个隐藏/恢复进程窗口的代码，我做的是这样的：

隐藏进程：

1）在正在运行的进程中查找进程名称。

2）将MainWindowHandle添加到Container（在本例中为Dictionary），稍后取消隐藏该过程是必要的。

3）使用ShowWindow API函数隐藏进程。

取消隐藏流程：

1）在正在运行的进程中查找进程名称。

2）从容器中检索指定进程的已保存MainWindowHandle。

3）使用ShowWindow API函数取消隐藏进程。

为什么我使用字典取消隐藏进程？，因为隐藏进程的MainWindowHandle值为0 ，所以这是我找到的唯一方法来检索在ShowWindow函数中使用的正确句柄来恢复进程。

但我真的不想依赖于在Hide进程之前保存所需HWND的Hide方法，我想通过指定进程名称知道如何在VB.NET或C＃中执行取消隐藏操作来改进这一切。 （例如： cmd.exe ）在MainWindowHandle之前没有保存，这可能吗？

我展示了代码（在VB.NET中），让您了解我为HideProcess方法所做的工作：

但请注意，此代码与问题并不完全相关，我的问题是如何仅通过指定进程名称取消隐藏进程名称以避免下面编写的代码需要检索已保存的句柄以取消隐藏进程。

' Hide-Unhide Process
'
' Usage Examples :
'
' HideProcess(Process.GetCurrentProcess().MainModule.ModuleName)
' HideProcess("notepad.exe", Recursivity:=False)
' HideProcess("notepad", Recursivity:=True)
'
' UnhideProcess(Process.GetCurrentProcess().MainModule.ModuleName)
' UnhideProcess("notepad.exe", Recursivity:=False)
' UnhideProcess("notepad", Recursivity:=True)

Private ProcessHandles As New Dictionary(Of String, IntPtr)

<System.Runtime.InteropServices.DllImport("User32")>
Private Shared Function ShowWindow(ByVal hwnd As IntPtr, ByVal nCmdShow As Integer) As Integer
End Function

Private Sub HideProcess(ByVal ProcessName As String, Optional ByVal Recursivity As Boolean = False)

    If ProcessName.EndsWith(".exe", StringComparison.OrdinalIgnoreCase) Then
        ProcessName = ProcessName.Remove(ProcessName.Length - ".exe".Length)
    End If

    Dim Processes() As Process = Process.GetProcessesByName(ProcessName)

    Select Case Recursivity

        Case True
            For Each p As Process In Processes
                ProcessHandles.Add(String.Format("{0};{1}", ProcessName, CStr(p.Handle)), p.MainWindowHandle)
                ShowWindow(p.MainWindowHandle, 0)
            Next p

        Case Else
            If Not (Processes.Count = 0) AndAlso Not (Processes(0).MainWindowHandle = 0) Then
                Dim p As Process = Processes(0)
                ProcessHandles.Add(String.Format("{0};{1}", ProcessName, CStr(p.Handle)), p.MainWindowHandle)
                ShowWindow(p.MainWindowHandle, 0)
            End If

    End Select

End Sub

Private Sub UnhideProcess(ByVal ProcessName As String, Optional ByVal Recursivity As Boolean = False)

    If ProcessName.EndsWith(".exe", StringComparison.OrdinalIgnoreCase) Then
        ProcessName = ProcessName.Remove(ProcessName.Length - ".exe".Length)
    End If

    Dim TempHandles As New Dictionary(Of String, IntPtr)
    For Each Handle As KeyValuePair(Of String, IntPtr) In ProcessHandles
        TempHandles.Add(Handle.Key, Handle.Value)
    Next Handle

    For Each Handle As KeyValuePair(Of String, IntPtr) In TempHandles

        If Handle.Key.ToLower.Contains(ProcessName.ToLower) Then

            ShowWindow(Handle.Value, 9)
            ProcessHandles.Remove(Handle.Key)

            If Recursivity Then
                Exit For
            End If

        End If

    Next Handle

End Sub

Answer 1

码：

using System.Diagnostics;
using System.Runtime.InteropServices;

[DllImport("User32")]
private static extern int ShowWindow(IntPtr hwnd, int nCmdShow);

[DllImport("User32.dll")]
private static extern IntPtr FindWindowEx(IntPtr hwndParent, IntPtr hwndChildAfter, string strClassName, string strWindowName);

[DllImport("user32.dll")]
private static extern int GetWindowThreadProcessId(IntPtr hWnd, out int ProcessId);

private const int SW_RESTORE = 9;

private void UnhideProcess(string processName) //Unhide Process
{
    IntPtr handle = IntPtr.Zero;
    int prcsId = 0;

    //an array of all processes with name "processName"
    Process[] localAll = Process.GetProcessesByName(processName);

    //check all open windows (not only the process we are looking) begining from the
    //child of the desktop, handle = IntPtr.Zero initialy.
    do
    {
        //get child handle of window who's handle is "handle".
        handle = FindWindowEx(IntPtr.Zero, handle, null, null);

        GetWindowThreadProcessId(handle, out prcsId); //get ProcessId from "handle"

        //if it matches what we are looking
        if (prcsId == localAll[0].Id)
        {
            ShowWindow(handle, SW_RESTORE); //Show Window

            return;
        }
    } while (handle != IntPtr.Zero);
}

如果有更多具有相同名称的实例，则可以使用变量，例如count ，并在if语句中将其递增

int count = 0;

if (prcsId == localAll[count].Id)
{
    ShowWindow(handle, SW_RESTORE);

    count++;
}

FindWindowEx函数

FindWindowEx（）和Process.MainWindowHandle（）之间的区别可能是每个函数都在寻找句柄。 与MainWindowHandle不同， FindWindowEx（）无处不在。 进程句柄也被称为HANDLE ，窗口一被称为HWND

Answer 2

我为vb.net编写了这个解决方案，感谢@γηράσκωδ'αείπολλάδιδασκόμε

<System.Runtime.InteropServices.DllImport("User32")>
Private Shared Function ShowWindow(
         ByVal hwnd As IntPtr,
         ByVal nCmdShow As Integer
) As Integer
End Function

<System.Runtime.InteropServices.DllImport("User32.dll")>
Private Shared Function FindWindowEx(
        ByVal hwndParent As IntPtr,
        ByVal hwndChildAfter As IntPtr,
        ByVal strClassName As String,
        ByVal strWindowName As String
) As IntPtr
End Function

<System.Runtime.InteropServices.DllImport("user32.dll")>
Private Shared Function GetWindowThreadProcessId(
        ByVal hWnd As IntPtr,
        ByRef ProcessId As Integer
) As Integer
End Function

Public Enum WindowState As Integer

    ''' <summary>
    ''' Hides the window and activates another window.
    ''' </summary>
    Hide = 0I

    ''' <summary>
    ''' Activates and displays a window. 
    ''' If the window is minimized or maximized, the system restores it to its original size and position.
    ''' An application should specify this flag when displaying the window for the first time.
    ''' </summary>
    Normal = 1I

    ''' <summary>
    ''' Activates the window and displays it as a minimized window.
    ''' </summary>
    ShowMinimized = 2I

    ''' <summary>
    ''' Maximizes the specified window.
    ''' </summary>
    Maximize = 3I

    ''' <summary>
    ''' Activates the window and displays it as a maximized window.
    ''' </summary>      
    ShowMaximized = Maximize

    ''' <summary>
    ''' Displays a window in its most recent size and position. 
    ''' This value is similar to <see cref="WindowVisibility.Normal"/>, except the window is not actived.
    ''' </summary>
    ShowNoActivate = 4I

    ''' <summary>
    ''' Activates the window and displays it in its current size and position.
    ''' </summary>
    Show = 5I

    ''' <summary>
    ''' Minimizes the specified window and activates the next top-level window in the Z order.
    ''' </summary>
    Minimize = 6I

    ''' <summary>
    ''' Displays the window as a minimized window. 
    ''' This value is similar to <see cref="WindowVisibility.ShowMinimized"/>, except the window is not activated.
    ''' </summary>
    ShowMinNoActive = 7I

    ''' <summary>
    ''' Displays the window in its current size and position.
    ''' This value is similar to <see cref="WindowVisibility.Show"/>, except the window is not activated.
    ''' </summary>
    ShowNA = 8I

    ''' <summary>
    ''' Activates and displays the window. 
    ''' If the window is minimized or maximized, the system restores it to its original size and position.
    ''' An application should specify this flag when restoring a minimized window.
    ''' </summary>
    Restore = 9I

    ''' <summary>
    ''' Sets the show state based on the SW_* value specified in the STARTUPINFO structure 
    ''' passed to the CreateProcess function by the program that started the application.
    ''' </summary>
    ShowDefault = 10I

    ''' <summary>
    ''' <b>Windows 2000/XP:</b> 
    ''' Minimizes a window, even if the thread that owns the window is not responding. 
    ''' This flag should only be used when minimizing windows from a different thread.
    ''' </summary>
    ForceMinimize = 11I

End Enum

Private Sub SetWindowState(ByVal ProcessName As String,
                           ByVal WindowState As WindowState,
                           Optional ByVal Recursivity As Boolean = False)

    If ProcessName.EndsWith(".exe", StringComparison.OrdinalIgnoreCase) Then
        ProcessName = ProcessName.Remove(ProcessName.Length - ".exe".Length)
    End If

    Dim pHandle As IntPtr = IntPtr.Zero
    Dim pID As Integer = 0I

    Dim Processes As Process() = Process.GetProcessesByName(ProcessName)

    ' If any process matching the name is found then...
    If Processes.Count = 0 Then
        Exit Sub
    End If

    For Each p As Process In Processes

        Do Until pID = p.Id ' Check all windows.

            ' Get child handle of window who's handle is "pHandle".
            pHandle = FindWindowEx(IntPtr.Zero, pHandle, Nothing, Nothing)

            ' Get ProcessId from "pHandle".
            GetWindowThreadProcessId(pHandle, pID)

            ' If the ProcessId matches the "pID" then...
            If pID = p.Id Then

                ShowWindow(pHandle, WindowState)

                If Not Recursivity Then
                    Exit For
                End If

            End If

        Loop

    Next p

End Sub