IStylusPlugin::CustomStylusDataAdded method (rtscom.h)

Article
02/22/2024

Notifies the implementing plug-in that custom stylus data is available.

Syntax

HRESULT CustomStylusDataAdded(
  [in] IRealTimeStylus *piRtsSrc,
  [in] const GUID      *pGuidId,
  [in] ULONG           cbData,
  [in] const BYTE      *pbData
);

Parameters

[in] piRtsSrc

The RealTimeStylus Class (RTS) object that sent the notification.

[in] pGuidId

The globally unique identifier (GUID) for the custom data.

[in] cbData

The size, in chars, of the buffer, pbData. Valid values are 0 through 0x7FFF, inclusive.

[in] pbData

A pointer to the buffer containing the custom data sent by the RTS object.

Return value

For a description of return values, see RealTimeStylus Classes and Interfaces.

Remarks

This method is called when IStylusPlugin::CustomStylusDataAdded Method is being processed. The custom data is passed in the pbData member, with a GUID in the pGuidId member to pass type information. This class cannot be inherited.

Examples

The following C++ code example implements a IStylusPlugin::CustomStylusDataAdded Method method that handles the data from a gesture event and sets a static text control, m_pStatusControl, to a string representation of the gesture data.

STDMETHODIMP CGestureHandler::CustomStylusDataAdded( 
            /* [in] */ IRealTimeStylus *piRtsSrc,
            /* [in] */ const GUID *pGuidId,
            /* [in] */ ULONG cbData,
            /* [in] */ const BYTE *pbData)
{
	// Did we get passed gesture data?
	if (*pGuidId == GUID_GESTURE_DATA)
	{
		// Another way to check for gestures is to see if the data
		// is the right size and actually points to something
		if ((cbData == sizeof(GESTURE_DATA)) && (pbData != NULL))
		{
			// Access the data coming as a GESTURE_DATA structure
			GESTURE_DATA* pGD = (GESTURE_DATA*)pbData;

			CString strStatus;
			CString strGestureId;
			
			// Helper function that maps the gesture ID to a string value
			SetGestureString(pGD->gestureId, &strGestureId);

			strStatus.Format(L"Gesture=%s\tConfidence=%d\tStrokes=%d", strGestureId, pGD->recoConfidence, pGD->strokeCount);
			m_pStatusControl->SetWindowTextW(strStatus);
		}
		else
		{
			m_pStatusControl->SetWindowTextW(L"Not gesture data.");
		}
	}
	else
	{
		m_pStatusControl->SetWindowTextW(L"Not gesture data.");
	}

	return S_OK;
}

Requirements

Requirement	Value
Minimum supported client	Windows XP Tablet PC Edition [desktop apps only]
Minimum supported server	None supported
Target Platform	Windows
Header	rtscom.h
DLL	RTSCom.dll

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