This repo is left here for historic interest. Further development is now continued by a group effort at https://github.com/MouseUnSnag/MouseUnSnag (which is now the official root for all new forks of MouseUnSnag).
On a Windows system with multiple monitors, allow the mouse to move freely and not get stuck on corners or edges.
This is a relatively simple, one-file, command-line C# program that solves the problem of the mouse getting "stuck" on corners and edges when moving between multiple monitors on a Windows system.
You can download and run this project's "released" executable (currently less than 15Kbytes!!) RELEASE LINK, or click on "release" in the GitHub GUI above.
If you like, you may instead compile the program at the command line. It requires at least version 7 of the C# compiler. You can get the latest version of the command-line C# compiler (no need to install the whole Visual Studio!!) using NuGet (Latest NuGet.exe), from a Windows CMD command line:
nuget install Microsoft.Net.Compilers
This will install the C# compiler in a subdirectory under your current folder. Assuming the version you just installed was 2.6.1, and assuming the MouseUnSnag.cs source code is in your current directory, you could then compile the program like this:
Microsoft.Net.Compilers.2.6.1\tools\csc.exe MouseUnSnag.cs
Then you can run the program by just typing the name of the executable, MouseUnSnag. That's it!!
The program endeavors to fix two separate problems related to multiple monitors, which were brought up in a couple of superuser.com posts. The respective authors also provided nice graphical representations of the problems.
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Mouse gets stuck on corners. This is an intentional feature of Windows, to keep the mouse from "sliding off" the corner of the monitor when you are trying to get to the task bar at the bottom of the screen. But if you find it annoying rather than helpful, MouseUnSnag will fix it for you.
How to disable sticky corners in Windows 10 - superuser.com
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Mouse gets stuck on an edge, where one monitor is taller than the adjacent monitor.
How to make the mouse wrap from corners when moving between monitors? - superuser.com
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MouseUnSnag also wraps the cursor around from the right edge of the rightmost monitor, to the left edge of the leftmost monitor, and vice versa. (I don't have a fancy graphic for that one!)
MouseUnSnag uses the low-level Win32 WH_MOUSE_LL callback to monitor the user's intended movement of the mouse. It also monitors the current position of the cursor on the screen. When MouseUnSnag detects that the mouse has tried to move beyond the edge/corner of the screen, but the cursor was not able to move, then it knows that the cursor is "stuck", and will attempt to sensibly move the cursor to an adjacent monitor, if one exists.
Although I believe this is quite a useful program, it is obviously not very "user friendly". It just runs at the command line (you must "minimize" the CMD console window, to get it out of the way), and prints out some debugging information on the console as you move the mouse around. If more than three or four people actually wind up using the program, and there is interest, it may be worth investing some effort towards some improvements, such as:
- Getting rid of the "command line" interface, and instead have an associated System Tray icon.
- Allow enabling and disabling of features, in case you don't like the "wrap-around", for instance.
- Allow more complex options for removing cursor "stickiness" only on particular edges or corners.
... and so on.