Original Link 
https://wangy.fun/2021/09/30/Mouse-Without-Borders-Experience/
tutorial
The tutorial for using this software is as follows:
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The computers on both sides need to be connected to the same LAN. In my environment, the laptop is under the wireless network of the campus network, and the desktop is connected to the wired network.
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Both computers need to have this software installed.
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Use cmd to query the respective IPs of the two computers, and add the corresponding relationship between the IP and the computer name at the end.
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Fill in the same Security Key to connect, and the intercommunication between mouse and keyboard can be realized.
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The relevant settings can be seen in the specific introduction in the software, which is relatively easy to understand.
problems encountered
Environment: Windows 10
I only encountered the following problem during use. The mouse icon on the charged computer will become larger. I used the following methods to solve it:
Settings->Ease of Access->Interaction->Mouse->Turn on Control mouse with keypad.
The following 3 options can be removed.
Reference blog: www.blog.sina.com.cn/s/blog_4acbd39c01030a2x.html