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Send signal to process by PID in Windows, like POSIX kill

Windows has no process signaling mechanism like what POSIX provide using the kill command. But windows-kill will bring the ability to windows. send signal to process by PID.

Why windows-kill?

Well, I’m a node.js developer. Node has a functionality that could send signals to other process, by their PID. This functionality works great on POSIX OSes but in windows, no signal is supported (even SIGINT and SIGBREAK, that node stated is supported in windows), and sending any of those signals to any process in windows, will result in an immediate kill of those process (Even if those process have listener on sent signals). In one of my project signal sending and listening was a serious need. So I’ve made some research about windows signal send, and found an OLD (2003) project named SendSignal. Well that project doesn’t support 64bit systems and also could only send SIGNBREAK (Ctrl + Break) signal. More searches lead me to an enhanced version of SendSignal, that add support of 64bit systems, but only support sending SIGINT (Ctrl + C) signal. So I’ve decided to write a library that support both 32bit & 64bit systems, and also both SIGNBREAK and SIGINT signals. The result is the windows-kill-library that has all the functionality I’ve needed and is the heart of windows-kill. For information about windows-kill-library, navigate to windows-kill-library Documentation.


  • Support both 32bit (Win32) & 64bit (x64) Windows
  • Support both SIGNBREAK (Ctrl + Break) and SIGINT (Ctrl + C) Signals
  • A library that could be used directly (#include), As a static library (.lib) and a dynamic library (.dll)
  • Prebuilt binaries and libraries


Prebuilt Binaries Fastest and easiest way to install and use the windows-kill is download the prebuilt binaries. You could find them in project repo’s Releases page. Both the 32bit (Win32) and 64bit (x64) versions are available. Compile & Build from Source code if you want to compile from the source code, you must install Visual Studio plus C++ development tools first. I’m developing this project in Visual Studio 2015 update 3. So it’s recommended to use the same Visual Studio version. But maybe other versions are ok to use. Also I didn’t compile the project using other C++ compilers. So any contribution to add other compilers support is welcomed! After the Visual Studio installation, clone the GitHub project or download the latest master branch source code and extract the downloaded zip. Go to the project folder and open the windows-kill.sln in Visual Studio. From the build menu, click on batch build. There you could see different build configurations. For more information about build configuration see Build Configurations.

Usage Examples

Using the windows-kill is easy & straightforward. It’s just like POSIX kill. Just navigate to the folder that contains windows-kill.exe and open a cmd from that folder, or add that folder in Environment Variables so you could use the command from any cmd. If signal sending was successful or any error occurred during the sending, appropriate message will be print in cmd.

Sending signal to PID

>windows-kill -SIGNALTYPE PID

Sending SIGBREAK (Ctrl + Break) to sample 1234 PID

>windows-kill -SIGBREAK 1234 >windows-kill -1 1234

Sending SIGINT (Ctrl + C) to sample 1234 PID

>windows-kill -SIGINT 1234 >windows-kill -2 1234

List supported signal types

>windows-kill -l

Usage help

>windows-kill -h

Build Configurations

windows-kill Visual Studio solution contains different build configuration. There are two main Debug and Release configuration category. Each of these categories have two separate configurations for building the windows-kill-library as a dynamic link library (.dll) or static link library (.lib). Also all the build configurations in Visual Studio has 32bit (Win32) & 64bit (x64) versions. In Summary there are 4 build configurations:
  • Debug Dll: Build windows-kill-library as a .dll with debug enabled.
  • Debug Lib: Build windows-kill-library as a .lib with debug enabled.
  • Release Dll: Build windows-kill-library as a .dll without debug.
  • Release Lib: Build windows-kill-library as a .lib without debug.

Bugs & feature requests

For submitting bugs or feature requests, use project Github repository issues.


The windows-kill & windows-kill-library are based on:


windows-kill is licensed under MIT License. see the LICENSE file for details.


  • Alireza Dabiri Nejad