基于Visual C++2010与windows SDK fo windows7开发windows7平台的tabletpc应用(1)-汉字手写轨迹输入

搭建好Visual C++2010与windows SDK fo windows7的开发平台以后，

小试牛刀，检验下开发windows7的下的tabletpc应用，

代码注释如下

#include <windows.h>
#include <comdef.h>
#include <msinkaut.h>
#include <msinkaut_i.c>  //包含windows SDK  for windows7的核心tabletpc头文件
#include "resource.h"


const TCHAR*    gc_szAppName = TEXT("Basic Recognition");

// 建立轨迹指针，识别指针，轨迹画板指针
IInkCollector *     g_pIInkCollector    = NULL;
IInkDisp *          g_pIInkDisp         = NULL;
IInkRecognizerContext *   g_pIInkRecoContext  = NULL;

/////////////////////////////////////////////////////////
//

//清除Com指针
/////////////////////////////////////////////////////////
void CleanUp()  // Release all objects
{
    if (g_pIInkRecoContext != NULL)
    {
        g_pIInkRecoContext->Release();
        g_pIInkRecoContext = NULL;
    }

    if (g_pIInkDisp != NULL)
    {
        g_pIInkDisp->Release();
        g_pIInkDisp = NULL;
    }

    if (g_pIInkCollector != NULL)
    {
        g_pIInkCollector->Release();
        g_pIInkCollector = NULL;
    }
}

windows窗口消息循环
LRESULT CALLBACK WndProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch (uMsg)
    {
        case WM_CREATE:
        {
           //窗口消息创建，注册窗口，并创建com指针接口
            HRESULT hr;

         
           
            hr = CoCreateInstance(CLSID_InkRecognizerContext,
                                  NULL, CLSCTX_INPROC_SERVER,
                                  IID_IInkRecognizerContext,
                                  (void **) &g_pIInkRecoContext);
            if (FAILED(hr))
            {
               
                return -1;
            }

          
            hr = CoCreateInstance(CLSID_InkCollector,
                                  NULL, CLSCTX_INPROC_SERVER,
                                  IID_IInkCollector,
                                  (void **) &g_pIInkCollector);
            if (FAILED(hr))
                return -1;

           
            hr = g_pIInkCollector->get_Ink(&g_pIInkDisp);
            if (FAILED(hr))
                return -1;

          
            hr = g_pIInkCollector->put_hWnd((long)hwnd);
            if (FAILED(hr))
                return -1;

            hr = g_pIInkCollector->put_Enabled(VARIANT_TRUE);
            if (FAILED(hr))
                return -1;

            break;
        }

        case WM_DESTROY:
          //退出消息循环，结束程序
            PostQuitMessage(0);
            break;

        case WM_COMMAND:
//清除轨迹

            if (wParam == ID_CLEAR)
            {
               
                g_pIInkDisp->DeleteStrokes(0);

          
                InvalidateRect(hwnd, NULL, TRUE);
            }
            else if (wParam == ID_RECOGNIZE)
            {   //获取识别结果，并显示最优化识别结果
              
                HCURSOR hCursor = ::SetCursor(::LoadCursor(NULL, IDC_WAIT));
               //获取轨迹指针用于识别
                IInkStrokes* pIInkStrokes = NULL;
                HRESULT hr = g_pIInkDisp->get_Strokes(&pIInkStrokes);
                if (SUCCEEDED(hr))
                {
                
                    hr = g_pIInkRecoContext->putref_Strokes(pIInkStrokes);
                    if (SUCCEEDED(hr))
                    {    //利用识别指针获取识别结果
               
                        IInkRecognitionResult* pIInkRecoResult = NULL;
                        InkRecognitionStatus RecognitionStatus;
                        hr = g_pIInkRecoContext->Recognize(&RecognitionStatus, &pIInkRecoResult);
                        if (SUCCEEDED(hr) && (pIInkRecoResult!= NULL))
                        {
                      
                            BSTR bstrBestResult = NULL;
                            hr = pIInkRecoResult->get_TopString(&bstrBestResult);
                            pIInkRecoResult->Release();
                            pIInkRecoResult = NULL;

                    
                            if (SUCCEEDED(hr) && bstrBestResult)
                            {
                                MessageBoxW(hwnd, bstrBestResult,
                                            L"识别结果", MB_OK);
                                SysFreeString(bstrBestResult);
                            }
                        }
                 
                        g_pIInkRecoContext->putref_Strokes(NULL);
                    }
                    pIInkStrokes->Release();
                }
       
                ::SetCursor(hCursor);
            }
            else
            {
                return DefWindowProc(hwnd, uMsg, wParam, lParam);
            }
            break;

        default:
            return DefWindowProc(hwnd, uMsg, wParam, lParam);
    }

    return 0;
}
//注册windows 窗口类名

BOOL RegisterWindowClass(HINSTANCE hInstance)
{
   
    WNDCLASSEX WndClassEx;

    WndClassEx.cbSize        = sizeof(WndClassEx);
    WndClassEx.style         = CS_HREDRAW | CS_VREDRAW;
    WndClassEx.lpfnWndProc   = WndProc;
    WndClassEx.cbClsExtra    = 0;
    WndClassEx.cbWndExtra    = 0;
    WndClassEx.hInstance     = hInstance;
    WndClassEx.hIcon         = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_ICON));
    WndClassEx.hIconSm       = WndClassEx.hIcon;
    WndClassEx.hCursor       = LoadCursor(NULL, IDC_ARROW);
    WndClassEx.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
    WndClassEx.lpszMenuName  = MAKEINTRESOURCE(IDR_MENU);
    WndClassEx.lpszClassName = gc_szAppName;

    if (!RegisterClassEx(&WndClassEx))
    {
        
        return false;
    }

    return true;
}


int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE ,
                     LPSTR     ,
                     int       nCmdShow)
{
    if (!RegisterWindowClass(hInstance))
        return 0;

    CoInitialize(NULL);
//创建窗口
    HWND hWnd = CreateWindowEx(WS_EX_CLIENTEDGE, gc_szAppName, gc_szAppName,
                               WS_OVERLAPPEDWINDOW,
                               CW_USEDEFAULT, CW_USEDEFAULT,
                               CW_USEDEFAULT, CW_USEDEFAULT,
                               NULL, NULL, hInstance, NULL);
    if (NULL == hWnd)
    {
        
        return 0;
    }

    // 显示窗口
    ShowWindow(hWnd, nCmdShow);
    UpdateWindow(hWnd);

    // 开始消息循环
    MSG msg;
    while (GetMessage(&msg, NULL, 0, 0) > 0)
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }

    CleanUp();
    CoUninitialize();

    return msg.wParam;
}

VS2010启动界面

VS2010项目开发

程序界面，以及轨迹

轨迹识别结果

清除笔迹

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