未声明 Visual c++ 标识符

当我被告知未声明标识符时，我遇到了一些无意义的错误

    POINT positionCursor;
    HWND handle;
    LPWSTR title;
    int bufsize;


    mousePosition->Text=Cursor->Position.ToString();
    positionCursor.x = Cursor->Position.X;
    positionCursor.y = Cursor->Position.Y;

    handle = WindowFromPhysicalPoint(positionCursor);

    bufsize = GetWindowTextLength(handle) + 1;
    title = new WCHAR[bufsize];

    GetWindowText(handle, title, bufsize);
    std::wstring temp = title;
    System::String ^str3 = Convert::ToString(temp.c_str());

    windowText->Text= str3;