C++動態(tài)加載donsee32.dll方法，不依賴于donsee32.h和donsee32.lib文件。

void CtestDemoDlg::OnBnClickedButton4()

{

    HINSTANCE g_hCtrlInstance;

    g_hCtrlInstance = LoadLibrary("donsee32.dll"); //加載dll

    if (!g_hCtrlInstance)

    {

    FreeLibrary(g_hCtrlInstance);

    ShowInfo("加載donsee32.dll失?。?quot;);

    return;

    }

    typedef long(_stdcall* fpDonsee_Open)(char*);//宏定義函數指針類型,輸出接口，定義函數指針

    fpDonsee_Open Donsee_Open = (fpDonsee_Open)GetProcAddress(g_hCtrlInstance, "Donsee_Open");//函數指針聲明,聲明變量

    typedef long(_stdcall* fpDonsee_Beep)();//蜂鳴

    fpDonsee_Beep Donsee_Beep = (fpDonsee_Beep)GetProcAddress(g_hCtrlInstance, "Donsee_Beep");

    typedef long(_stdcall* fpDonsee_ReadIDCard)(int, char*, IDINFO*, char*);//讀身份證

    fpDonsee_ReadIDCard Donsee_ReadIDCard = (fpDonsee_ReadIDCard)GetProcAddress(g_hCtrlInstance, "Donsee_ReadIDCard");

    if (Donsee_Open == NULL || Donsee_Beep == NULL || Donsee_ReadIDCard==NULL)

    {

    ShowInfo("加載Dll函數失?。?quot;);

    FreeLibrary(g_hCtrlInstance);

    return;

    }

    long t_nRe;

    t_nRe = Donsee_Open("USB");

    if (t_nRe != 0)

    {

    FreeLibrary(g_hCtrlInstance);

    ShowInfo("打開讀卡器失??！");

    return;

    }

//讀身份證

    char t_arrMsg[256];

    char t_szPicPath[256] = "IDphoto.jpg";

    CString t_strTemp;

    IDINFO idInfo;

    memset(&idInfo, 0, sizeof(IDINFO));

    t_nRe = Donsee_ReadIDCard(1, t_szPicPath, &idInfo, t_arrMsg);

    if (t_nRe != 0)

    {

    FreeLibrary(g_hCtrlInstance);

    ShowInfo("身份證讀取失敗");

    return;

    }

    Donsee_Beep();

    ShowInfo("身份證讀取成功:");

    ShowInfo("證件類型標識：", idInfo.certType);

    ShowInfo("姓名：", idInfo.name);

    ShowInfo("性別：", idInfo.sex);

    ShowInfo("證件號碼：", idInfo.number);

    ShowInfo("出生日期：", idInfo.birthday);

    FreeLibrary(g_hCtrlInstance);

}