Microsip Api Documentation -

MicroSIP is a favorite among VoIP enthusiasts because it is lightweight (under 1MB), free, and open-source. However, most users only scratch the surface by using the GUI to make calls.

# Prepare WM_COPYDATA structure COPYDATA = struct.pack("PPI", 0, command, len(data)+1) win32gui.SendMessage(hwnd, win32con.WM_COPYDATA, 0, COPYDATA) microsip api documentation

import win32gui import win32con import struct def send_microsip_command(command, data=""): # Find the MicroSIP window hwnd = win32gui.FindWindow(None, "MicroSIP") if not hwnd: print("MicroSIP is not running.") return False MicroSIP is a favorite among VoIP enthusiasts because

# For commands requiring data (like CALL) if data: COPYDATA_DATA = struct.pack("PPI", 0, data, len(data)+1) win32gui.SendMessage(hwnd, win32con.WM_COPYDATA, 0, COPYDATA_DATA) This is where Method 2 shines

C:\Program Files\MicroSIP\MicroSIP.exe call " & Range("A1").Value If MicroSIP is already running, a second instance usually won't execute the command. This is where Method 2 shines. Method 2: The WM_COPYDATA API (The "Hidden" IPC) This is the real power user feature. MicroSIP listens for Windows messages, allowing an external script to send commands to an already running instance. Warning: This is not a web API. It requires writing a small program (C#, C++, AutoHotkey, or Python with win32gui ). Available Commands via WM_COPYDATA | Command | Purpose | Data Format | | :--- | :--- | :--- | | CALL | Make a call | Phone number (string) | | SMS | Send SMS | number|message | | ANSWER | Answer incoming call | (empty or 1 ) | | REJECT | Hang up/Reject | (empty) | | DTMF | Send digits during a call | Digits (e.g., 123# ) | | STATUS | Get current call status | (empty) | | TRANSFER | Blind transfer | Destination number | | HOLD | Toggle hold | (empty) | Example: Python Script to Dial from a Running MicroSIP Save this as dial.py (requires pywin32 ):