UiaCoreTypesApi.cs source code in C# .NET

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Code:

                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / AccessibleTech / longhorn / Automation / UIAutomationTypes / MS / Internal / Automation / UiaCoreTypesApi.cs / 1 / UiaCoreTypesApi.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: Imports from unmanaged UiaCore DLL 
//
// History: 
//  06/02/2003 : [....] Ported to WCP
//
//---------------------------------------------------------------------------
 

using System; 
using System.Security; 
using System.Runtime.InteropServices;
using Microsoft.Internal; 

namespace MS.Internal.Automation
{
    internal static class UiaCoreTypesApi 
    {
        //----------------------------------------------------- 
        // 
        //  Other API types
        // 
        //-----------------------------------------------------

        #region Other
        internal enum AutomationIdType 
        {
            Property, 
            Pattern, 
            Event,
            ControlType, 
            TextAttribute
        }

        internal const int UIA_E_ELEMENTNOTENABLED = unchecked((int)0x80040200); 
        internal const int UIA_E_ELEMENTNOTAVAILABLE = unchecked((int)0x80040201);
        internal const int UIA_E_NOCLICKABLEPOINT = unchecked((int)0x80040202); 
        internal const int UIA_E_PROXYASSEMBLYNOTLOADED = unchecked((int)0x80040203); 

        #endregion Other 

        //------------------------------------------------------
        //
        //  Internal Methods 
        //
        //----------------------------------------------------- 
 
        #region Internal Methods
 
        //
        // Support methods...
        //
 
        /// 
        ///    Critical: This code calls into the unmanaged UIAutomationCore.dll 
        ///    TreatAsSafe: This method simply converts a Guid representing an automation type to an int, making it safe to use. 
        /// 
        [SecurityCritical,SecurityTreatAsSafe] 
        internal static int UiaLookupId(AutomationIdType type, ref Guid guid)
        {
            return RawUiaLookupId( type, ref guid );
        } 

        ///  
        ///    Critical: This code calls into the unmanaged UIAutomationCore.dll 
        ///    TreatAsSafe: This method only returns a fixed known object representing an Unsupported value, making it safe to use.
        ///  
        [SecurityCritical,SecurityTreatAsSafe]
        internal static object UiaGetReservedNotSupportedValue()
        {
            object notSupportedValue; 
            CheckError(RawUiaGetReservedNotSupportedValue(out notSupportedValue));
            return notSupportedValue; 
        } 

        ///  
        ///    Critical: This code calls into the unmanaged UIAutomationCore.dll
        ///    TreatAsSafe: This method only returns a fixed known object representing a MixedAttribute value, making it safe to use.
        /// 
        [SecurityCritical,SecurityTreatAsSafe] 
        internal static object UiaGetReservedMixedAttributeValue()
        { 
            object mixedAttributeValue; 
            CheckError(RawUiaGetReservedMixedAttributeValue(out mixedAttributeValue));
            return mixedAttributeValue; 
        }

        #endregion Internal Methods
 
        //------------------------------------------------------
        // 
        //  Private Methods 
        //
        //------------------------------------------------------ 

        #region Private Methods

        // Check hresult for error... 
        private static void CheckError(int hr)
        { 
            if (hr >= 0) 
            {
                return; 
            }

            Marshal.ThrowExceptionForHR(hr);
        } 

        [SecurityCritical] 
        [SuppressUnmanagedCodeSecurity] 
        [DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaLookupId", CharSet = CharSet.Unicode)]
        private static extern int RawUiaLookupId(AutomationIdType type, ref Guid guid); 

        [SecurityCritical]
        [SuppressUnmanagedCodeSecurity]
        [DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaGetReservedNotSupportedValue", CharSet = CharSet.Unicode)] 
        private static extern int RawUiaGetReservedNotSupportedValue([MarshalAs(UnmanagedType.IUnknown)] out object notSupportedValue);
 
        [SecurityCritical] 
        [SuppressUnmanagedCodeSecurity]
        [DllImport(DllImport.UIAutomationCore, EntryPoint = "UiaGetReservedMixedAttributeValue", CharSet = CharSet.Unicode)] 
        private static extern int RawUiaGetReservedMixedAttributeValue([MarshalAs(UnmanagedType.IUnknown)] out object mixedAttributeValue);

        #endregion Private Methods
    } 
}

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

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