Microsip Api Documentation Jun 2026

using System; using System.Runtime.InteropServices; class MicroSIPController [DllImport("user32.dll", SetLastError = true)] static extern IntPtr FindWindow(string lpClassName, string lpWindowName); [DllImport("user32.dll", CharSet = CharSet.Auto)] static extern IntPtr PostMessage(IntPtr hWnd, uint Msg, IntPtr wParam, IntPtr lParam); const uint WM_COMMAND = 0x0111; // These IDs correspond to internal menu/button resource IDs in MicroSIP source code const int CMD_HANGUP = 1001; const int CMD_ANSWER = 1002; public static void SendHangup() IntPtr hWnd = FindWindow("MicroSIPWindow", null); if (hWnd != IntPtr.Zero) PostMessage(hWnd, WM_COMMAND, (IntPtr)CMD_HANGUP, IntPtr.Zero); Use code with caution.

Before diving into APIs, it is helpful to understand the software's internal structure. The application follows a modular architecture with a clear separation of concerns between the UI, core functionality, and the PJSIP library integration.

MicroSIP’s API is simpler but more lightweight and local-process friendly than competitors. It is ideal for Windows-only automation with minimal overhead.

Download MicroSIP source from GitHub, search for case WM_COPYDATA in main.cpp . All supported dwData values are defined as #define COMMAND_DIAL 1 , etc. microsip api documentation

The Microsip API provides a powerful and flexible way to integrate SIP functionality into your applications. With its simple and intuitive API, developers can quickly create SIP-based applications that enable features such as voice and video calling, instant messaging, and presence. For more information on using the Microsip API, please refer to the documentation and example code provided.

For a deeper level of control and more stable integration, developers often move beyond the basic -n flag to construct detailed command lines.

By leveraging the Microsip API and its extensive documentation, developers can build robust and scalable SIP-based applications that meet the needs of their users. using System; using System

This is the main configuration file. Its location depends on the installation mode:

Microsip is a lightweight, open-source SIP client that supports various audio and video codecs, including G.729, G.711, and H.264. It is designed to be highly customizable and extensible, making it an ideal choice for developers who want to integrate SIP functionality into their applications. Microsip supports various platforms, including Windows, Linux, and macOS.

The MicroSIP API has :

MicroSIP is a lightweight, open-source SIP softphone for Windows that implements the Session Initiation Protocol (SIP) to enable voice and video calls over IP. While MicroSIP itself focuses on providing a compact, user-friendly client rather than a full developer platform, understanding its architecture, interaction points, and how developers can integrate or automate SIP clients in general is useful for building communications solutions. This essay outlines MicroSIP’s role in the SIP ecosystem, possible extension and automation approaches, protocol-level details relevant to integration, and practical considerations for developers seeking to use or interface with MicroSIP.

For deep integration where your app needs to know the status of a call (e.g., is it ringing, connected, or ended?), you must use Windows Messages ( WM_COPYDATA ). This allows bidirectional communication:

When MicroSIP changes state, it broadcasts messages to external listeners using the format event:name?param1=value1¶m2=value2 . MicroSIP’s API is simpler but more lightweight and

A prime example is the use of a tool developed in Visual Basic 6 (VB6) that acts as a "wrapper" for MicroSIP. This tool doesn't handle the SIP protocol itself; instead, it leverages MicroSIP as the core engine. When a user clicks a number, the VB6 application constructs a specific command line and executes it:

This whole process happens in the background. This internal API is critical for any tool attempting to read or write MicroSIP.ini files programmatically. Directly injecting a plain-text password will break the file, so the correct encryption method must be used.