Adding ObjectIdentifiers definitions

src/WInterop.Desktop/Windows/ObjectIdentifier.cs

@@ -0,0 +1,98 @@
+// Copyright (c) Jeremy W. Kuhne. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace WInterop.Windows;
+
+/// <summary>
+///  Reserved IDs for system objects.
+/// </summary>
+public enum ObjectIdentifier : int
+{
+    // https://msdn.microsoft.com/library/windows/desktop/dd373606.aspx
+
+    /// <summary>
+    ///  The window itself rather than a child object. [OBJID_WINDOW]
+    /// </summary>
+    Window = unchecked((int)0x00000000),
+
+    /// <summary>
+    ///  System menu. [OBJID_SYSMENU]
+    /// </summary>
+    SystemMenu = unchecked((int)0xFFFFFFFF),
+
+    /// <summary>
+    ///  Title bar. [OBJID_TITLEBAR]
+    /// </summary>
+    TitleBar = unchecked((int)0xFFFFFFFE),
+
+    /// <summary>
+    ///  Menu bar. [OBJID_MENU]
+    /// </summary>
+    Menu = unchecked((int)0xFFFFFFFD),
+
+    /// <summary>
+    ///  The window's client area. In most cases, the operating system controls
+    ///  the frame elements and the client object contains all elements that are
+    ///  controlled by the application. Servers only process the WM_GETOBJECT
+    ///  messages in which the lParam is OBJID_CLIENT, OBJID_WINDOW, or a custom
+    ///  object identifier. [OBJID_CLIENT]
+    /// </summary>
+    Client = unchecked((int)0xFFFFFFFC),
+
+    /// <summary>
+    ///  The window's vertical scroll bar. [OBJID_VSCROLL]
+    /// </summary>
+    VScroll = unchecked((int)0xFFFFFFFB),
+
+    /// <summary>
+    ///  The window's horizontal scroll bar. [OBJID_HSCROLL]
+    /// </summary>
+    HScroll = unchecked((int)0xFFFFFFFA),
+
+    /// <summary>
+    ///  The window's size grip: an optional frame component located at the lower-right
+    ///  corner of the window frame. [OBJID_SIZEGRIP]
+    /// </summary>
+    SizeGrip = unchecked((int)0xFFFFFFF9),
+
+    /// <summary>
+    ///  The text insertion bar (caret) in the window. [OBJID_CARET]
+    /// </summary>
+    Caret = unchecked((int)0xFFFFFFF8),
+
+    /// <summary>
+    ///  The mouse pointer. There is only one mouse pointer in the system, and it is not
+    ///  a child of any window. [OBJID_CURSOR]
+    /// </summary>
+    Cursor = unchecked((int)0xFFFFFFF7),
+
+    /// <summary>
+    ///  An alert that is associated with a window or an application. System provided
+    ///  message boxes are the only UI elements that send events with this object identifier.
+    ///  Server applications cannot use the AccessibleObjectFromX functions with this
+    ///  object identifier.  This is a known issue with Microsoft Active Accessibility.
+    ///  [OBJID_ALERT]
+    /// </summary>
+    Alert = unchecked((int)0xFFFFFFF6),
+
+    /// <summary>
+    ///  A sound object. Sound objects do not have screen locations or children, but they
+    ///  do have name and state attributes. They are children of the application that
+    ///  is playing the sound. [OBJID_SOUND]
+    /// </summary>
+    Sound = unchecked((int)0xFFFFFFF5),
+
+    /// <summary>
+    ///  An object identifier that Oleacc.dll uses internally. For more information,
+    ///  see Appendix F: https://learn.microsoft.com/windows/win32/winauto/appendix-f--object-identifier-values-for-objid-queryclassnameidx.
+    ///  [OBJID_QUERYCLASSNAMEIDX]
+    /// </summary>
+    QueryClassNameIdx = unchecked((int)0xFFFFFFF4),
+
+    /// <summary>
+    ///  In response to this object identifier, third-party applications can expose their
+    ///  own object model. Third-party applications can return any COM interface in response
+    ///  to this object identifier. [OBJID_NATIVEOM]
+    /// </summary>
+    NativeOM = unchecked((int)0xFFFFFFF0),
+}