Active Accessibility sends the WM_GETOBJECT message to obtain information about an accessible object contained in a server application. Applications never send this message directly. It is sent only by Active Accessibility in response to calls to AccessibleObjectFromPoint, AccessibleObjectFromEvent, or AccessibleObjectFromWindow. However, server applications handle this message.

oleacc

2: AccessibleObjectFromPoint

Summary

The AccessibleObjectFromPoint function retrieves the address of the IAccessible interface pointer for the object at a specified point on the screen.

public static extern IntPtr AccessibleObjectFromPoint(POINT pt, [Out, MarshalAs(UnmanagedType.Interface)] out IAccessible accObj, [Out] out object ChildID);

Declare Function AccessibleObjectFromPoint Lib "oleacc.dll" (TODO) As TODO

IntPtr success = AccessibleObjectFromPoint(pt, out accObj, out varChildID);

Documentation

AccessibleObjectFromPoint http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msaa/msaaccrf_2r7b.asp on MSDN

3: AccessibleObjectFromPoint

Summary

The AccessibleObjectFromPoint function retrieves the address of the IAccessible interface pointer for the object at a specified point on the screen.

public static extern IntPtr AccessibleObjectFromPoint(POINT pt, [Out, MarshalAs(UnmanagedType.Interface)] out IAccessible accObj, [Out] out object ChildID);

Shared Function AccessibleObjectFromPoint(ByVal pt As Point, <MarshalAs(UnmanagedType.Interface)> ByRef accObj As IAccessible, ByRef ChildID As Object) As IntPtr

IntPtr success = AccessibleObjectFromPoint(pt, out accObj, out varChildID);

Documentation

AccessibleObjectFromPoint http://msdn.microsoft.com/library/default.asp?url=/library/en-us/msaa/msaaccrf_5jp0.asp on MSDN

4: WindowFromAccessibleObject

handler = AccessibleObjectFromPoint(location,out iAccessible,out ChildId);

public static extern IntPtr AccessibleObjectFromPoint(MouseHook.POINT pt, [Out, MarshalAs(UnmanagedType.Interface)] out IAccessible accObj, [Out] out object ChildID);

Enums

5: WindowsMessages

/// Applications never send this message directly. It is sent only by Active Accessibility in response to calls to AccessibleObjectFromPoint, AccessibleObjectFromEvent, or AccessibleObjectFromWindow. However, server applications handle this message.

'''Active Accessibility sends the WM_GETOBJECT message to obtain information about an accessible object contained in a server application. Applications never send this message directly. It is sent only by Active Accessibility in response to calls to AccessibleObjectFromPoint AccessibleObjectFromEvent or AccessibleObjectFromWindow. However server applications handle this message.

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