尝试将UNICODE_STRING*转换为UNICODE_STING时出错

我正在尝试编写简单的驱动程序,以便在进程执行时获取图像的完整路径
基于 Steve Townsend Answer 我为我的 ProcessCallback 来自的电话 PsSetCreateProcessNotifyRoutine 在里面 DriverEntry 我的司机:

void ProcessCallback(
    IN HANDLE  hParentId, 
    IN HANDLE  hProcessId, 
    IN BOOLEAN bCreate
    )

{
    if(bCreate)
    {
        PEPROCESS proc = PsGetCurrentProcess();

        WCHAR  strBuffer[(sizeof(UNICODE_STRING) / sizeof(WCHAR)) + 260];
        UNICODE_STRING str;
        str =(UNICODE_STRING*)&strBuffer;

        //initialize
        str.Buffer = &strBuffer[sizeof(UNICODE_STRING) / sizeof(WCHAR)];
        str.Length = 0x0;
        str.MaximumLength = 260 * sizeof(WCHAR);

        //note that the seconds arg (27) is ProcessImageFileName
        ZwQueryInformationProcess(proc, 27, &strBuffer, sizeof(strBuffer), NULL);

        DbgPrint("Start @  %wZ\n", str.Buffer); 

    }
    else
        DbgPrint("PID %i Terminated",hProcessId );

}

但当我尝试构建代码时,我会遇到以下错误 str =(UNICODE_STRING*)&strBuffer; :

错误无法将UNICODE_STRING*转换为UNICODE_STING

怎么了??