The Z-text SDK provides an easy to use interface to the Z-text SMS Modem. The SDK provides a Microsoft Windows COM based component for sending SMS messages via the Z-text modem. Sample applications are also present, written in both C# for .Net users; MFC for C++ users and VB6 for Visual Basic users. The SDK also includes a Microsoft Windows command line program for sending SMS messages. The command line program is useful for sending messages from third party software like network monitors and network management systems.