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 / UIAutomationClient / MS / Internal / Automation / SafeProcessHandle.cs / 1305600 / SafeProcessHandle.cs
                        

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

// PRESHARP: In order to avoid generating warnings about unkown message numbers and unknown pragmas.
#pragma warning disable 1634, 1691 

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.Automation 
{ 
    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(NativeMethods.HWND hwnd) : base(true) 
        { 
            int processId;
 
            // Get process id...
            // GetWindowThreadProcessId does use SetLastError().  So a call to GetLastError() would be meanless.
            // Disabling the PreSharp warning.
#pragma warning suppress 6523 
            if (SafeNativeMethods.GetWindowThreadProcessId(hwnd, out processId) == 0)
            { 
                throw new ElementNotAvailableException(); 
            }
 
            SetHandle(Misc.OpenProcess(UnsafeNativeMethods.PROCESS_QUERY_INFORMATION | UnsafeNativeMethods.PROCESS_VM_READ, false, processId, hwnd));
        }

        // 

 
 
        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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