Microsip Api Documentation

using System;
using System.Runtime.InteropServices;
using System.Text;
class MicroSipAPI
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern IntPtr FindWindow(string lpClassName, string lpWindowName);
[DllImport("user32.dll", CharSet = CharSet.Auto)]
public static extern int SendMessage(IntPtr hWnd, int Msg, IntPtr wParam, ref COPYDATASTRUCT lParam);
public const int WM_COPYDATA = 0x004A;
[StructLayout(LayoutKind.Sequential)]
public struct COPYDATASTRUCT
public IntPtr dwData;
    public int cbData;
    public IntPtr lpData;
public static void Dial(string number)
IntPtr hWnd = FindWindow(null, "MicroSIP");
    if (hWnd == IntPtr.Zero) throw new Exception("MicroSIP not running");
byte[] bytes = Encoding.ASCII.GetBytes($"callto:number");
    COPYDATASTRUCT cds = new COPYDATASTRUCT();
    cds.dwData = (IntPtr)1;
    cds.cbData = bytes.Length + 1;
    cds.lpData = Marshal.AllocHGlobal(cds.cbData);
    Marshal.Copy(bytes, 0, cds.lpData, bytes.Length);
    Marshal.WriteByte(cds.lpData, bytes.Length, 0);
SendMessage(hWnd, WM_COPYDATA, IntPtr.Zero, ref cds);
    Marshal.FreeHGlobal(cds.lpData);

All command-line arguments from Part 2 work via WM_COPYDATA, plus a few extras.

| Command String | Effect | |----------------|---------| | callto:1000 | Initiate call | | hangup | End call | | answer | Answer call | | reject | Reject call | | mute | Toggle mute | | dtmf:123 | Send DTMF | | transfer:sip:1001 | Blind transfer | | status | Returns current status (as another message) | microsip api documentation

| Feature | MicroSIP | Zoiper (Pro) | Linphone (Belle) | | :--- | :--- | :--- | :--- | | CLI control | Yes | Yes | Yes | | WM_COPYDATA | Yes | No | No | | HTTP REST API | No | Yes (paid) | Yes (limited) | | Event callbacks | No | Yes (DLL injection) | Yes (DBus) | | Cross-platform | Windows only | Windows, macOS, Linux | Windows, macOS, Linux |

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

MicroSIP accepts command-line arguments for basic control:

# Make a call
MicroSIP.exe "sip:number@domain"