cpp手写识别

//设置手写识别语言
CComPtr<IInkRecognizers> spIInkRecognizers;
	if(SUCCEEDED(spIInkRecognizers.CoCreateInstance(CLSID_InkRecognizers)))
	{
		// 获取识别器数目
		LONG count = 0;
		hr = spIInkRecognizers->get_Count(&count);
		if(count > 0)
		{
			CComPtr<IInkRecognizer> spIInkRecognizer;
			for (LONG i = 0; i < count; i++)
			{
				if (FAILED(spIInkRecognizers->Item(i, &spIInkRecognizer)))
					continue;
				CComVariant vLanguages;
				if (SUCCEEDED(spIInkRecognizer->get_Languages(&vLanguages)))
				{
					if ((VT_ARRAY == (VT_ARRAY & vLanguages.vt))          
						&& (NULL != vLanguages.parray)
						&& (0 < vLanguages.parray->rgsabound[0].cElements)) 
					{
						CComBSTR bstrName;
						if (SUCCEEDED(spIInkRecognizer->get_Name(&bstrName)))
						{
							//LOG_D("lan = %s", CString(bstrName));
							if(wcscmp(bstrName, L"Microsoft 中文(简体)手写识别器") == 0)
							{
								m_InkRecoContext->Release();
								spIInkRecognizer->CreateRecognizerContext(&m_InkRecoContext);
								break;
							}
						}
					}
					spIInkRecognizer.Release();
				}
			}
		}
	}

//手写识别结果
vector<CString> Recognise()
{
	vector<CString> vecRet;

	IInkStrokes* pInkStrokes = NULL;
	HRESULT hr = S_FALSE;
	if(m_InkDisp && (hr = m_InkDisp->get_Strokes(&pInkStrokes)) == S_OK)
	{
		hr = m_InkRecoContext->putref_Strokes(pInkStrokes);

		if (SUCCEEDED(hr))
		{   
			//利用识别指针获取识别结果
			IInkRecognitionResult* pIInkRecoResult = NULL;
			InkRecognitionStatus RecognitionStatus;
			
			hr = m_InkRecoContext->Recognize(&RecognitionStatus, &pIInkRecoResult);

			if (SUCCEEDED(hr) && RecognitionStatus == IRS_NoError)
			{
				CComPtr<IInkRecognitionAlternates> spIInkRecoAlternates;
				hr = pIInkRecoResult->AlternatesFromSelection(
					0,                              // in: selection start 
					-1,                             // in: selection length; -1 means "up to the last one"
					10, // in: the number of alternates we're interested in
					&spIInkRecoAlternates           // out: the receiving pointer
					);

				// Count the returned alternates, it may be less then we asked for
				long lCount = 0;
				if (SUCCEEDED(hr) && SUCCEEDED(spIInkRecoAlternates->get_Count(&lCount)))
				{
					// Get the alternate strings
					IInkRecognitionAlternate* pIInkRecoAlternate = NULL;
					for (LONG iItem = 0; (iItem < lCount) && (iItem < 10); iItem++)
					{
						// Get the alternate string if there is one
						if (SUCCEEDED(spIInkRecoAlternates->Item(iItem, &pIInkRecoAlternate)))
						{
							CComBSTR bstr;
							if (SUCCEEDED(pIInkRecoAlternate->get_String(&bstr)))
							{
								vecRet.push_back(bstr.Copy());
							}
							pIInkRecoAlternate->Release();
						}   
					}
				}

				pIInkRecoResult->Release();
			}

			m_InkRecoContext->putref_Strokes(NULL);
		}
		
		pInkStrokes->Release();
	}

	return vecRet;
}

//撤销
void Undo()
{
	IInkStrokes* pInkStrokes = NULL;
	HRESULT hr = S_FALSE;
	if (m_InkDisp && (hr = m_InkDisp->get_Strokes(&pInkStrokes)) == S_OK)
	{
		long nCount = 0;
		pInkStrokes->get_Count(&nCount);
		if (nCount > 0)
		{
			IInkStrokeDisp* pInkStrokeDisp = NULL;
			if (pInkStrokes->Item(nCount - 1, &pInkStrokeDisp) == S_OK)
			{
				pInkStrokes->Remove(pInkStrokeDisp);
				m_InkDisp->DeleteStroke(pInkStrokeDisp);
				pInkStrokeDisp->Release();
				InvalidateRect(m_hWnd, NULL, TRUE);
			}

		}


		pInkStrokes->Release();
	}

}