From the developer: "The MarshallSoft DUN Dialer (MDD) is a library of functions that allows your 32-bit C/C++ application program to dial up a local ISP (Internet Service Provider) using any existing DUN (Dialup Network) connection. MDD4C supports and has been tested with Microsoft Visual C/C++, Borland C/C++, Turbo C/C++ for Windows, Borland C++ Builder, Watcom C/C++, and Lcc-Win32 compilers. It can also be used with most other C/C++ Windows compilers. MDD4C can be used with Windows 95/98/Me/NT/2000/XP. The shareware version of MDD4C is fully functional."