SafeProcessHandle.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / UIAutomation / Win32Providers / MS / Internal / AutomationProxies / SafeProcessHandle.cs / 1305600 / SafeProcessHandle.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// Description: 
// 
// History:
//  10/04/2003 : [....]    Created 
//---------------------------------------------------------------------------

using System;
using System.Security; 
using System.Security.Permissions;
using System.Runtime.InteropServices; 
using System.Runtime.CompilerServices; 
using System.Windows.Automation;
using Microsoft.Win32.SafeHandles; 
using MS.Win32;

namespace MS.Internal.AutomationProxies
{ 
    internal sealed class SafeProcessHandle : SafeHandleZeroOrMinusOneIsInvalid
    { 
        // This constructor is used by the P/Invoke marshaling layer 
        // to allocate a SafeHandle instance.  P/Invoke then does the
        // appropriate method call, storing the handle in this class. 
        private SafeProcessHandle() : base(true) {}

        internal SafeProcessHandle(IntPtr hwnd) : base(true)
        { 
            uint processId;
 
            if (hwnd == IntPtr.Zero) 
            {
                processId = UnsafeNativeMethods.GetCurrentProcessId(); 
            }
            else
            {
                // Get process id... 
                Misc.GetWindowThreadProcessId(hwnd, out processId);
            } 
 
            // handle might be used to query for Wow64 information (_QUERY_), or to do cross-process allocs (VM_*)
            SetHandle(Misc.OpenProcess(NativeMethods.PROCESS_QUERY_INFORMATION | NativeMethods.PROCESS_VM_OPERATION | NativeMethods.PROCESS_VM_READ | NativeMethods.PROCESS_VM_WRITE, false, processId, hwnd)); 
        }

        // Uncomment this if & only if we need a constructor
        // that takes a handle from external code 
        //internal SafeProcessHandle(IntPtr preexistingHandle, bool ownsHandle) : base(ownsHandle)
        //{ 
        //    SetHandle(preexistingHandle); 
        //}
 
        //


 
        protected override bool ReleaseHandle()
        { 
            return Misc.CloseHandle(handle); 
        }
    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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