IAccPropServices::ClearHwndProps method

This method wraps SetPropValue, SetPropServer, and ClearProps, and provides a convenient entry point for callers who are annotating HWND-based accessible elements.

Syntax

HRESULT ClearHwndProps(
  HWND             hwnd,
  DWORD            idObject,
  DWORD            idChild,
  const MSAAPROPID *paProps,
  int              cProps
);

Parameters

hwnd

Type: HWND

Identifies the accessible element that is to be annotated. This replaces the identity string.

idObject

Type: DWORD

Identifies the accessible element that is to be annotated. This replaces the identity string.

idChild

Type: DWORD

Identifies the accessible element that is to be annotated. This replaces the identity string.

paProps

Type: const MSAAPROPID*

Specifies an array of properties that is to be reset. These properties will revert to the default behavior that they displayed before they were annotated.

cProps

Type: int

Specifies the number of properties in the paProps array.

Return Value

Type: HRESULT

If successful, returns S_OK, even if the specified properties were never annotated on the accessible object; clearing already-cleared properties is considered a success.

Returns E_INVALIDARG if any of the properties in the paProps array are not supported.

May return other error codes under exceptional error conditions such as low memory.

For descriptions of return values, see the corresponding SetPropValue, SetPropServer, or ClearProps method.

Remarks

By using this method, the caller does not have to obtain an identity string; it can specify the hwnd, idObject, and idChild parameters directly.

Additionally, SetHwndPropStr takes a regular Unicode string as a parameter; the caller does not need to specially allocate a BSTR.

Requirements

   
Minimum supported client Windows XP [desktop apps only]
Minimum supported server Windows Server 2003 [desktop apps only]
Target Platform Windows
Header oleacc.h (include OleAcc.h Include Initguid.h first.)
DLL Oleacc.dll
Redistributable Active Accessibility 2.0 RDK on Windows NT 4.0 with SP6 and later and Windows 98

See Also

ClearProps

IAccPropServices

SetHwndProp

SetHwndPropServer

SetHwndPropStr