camstudio | CamStudio forkFix memory leaks | Build Tool library

For a presentation project, how to draw a temporary circle around mouse cursor, at the mouse click event (N.B. non only over the form, also on the Windows Desktop)

In example, like the CamStudio circle that appear at 'onMouseClick' event. Or like the circle that appear around the mouse cursor at the click event when windows PSR.exe is running.

1. some users have recommended a transparent form to easily manage the onMouseClick event.

   in my opinion, this is a wrong solution for some reasons.

   The main thing is that if you create a transparent form, appear very hard to manage a click event, in example in the taskbar (as pointed in these other discussions)

   Form background transparency but still have click events

   Keep form always on top of taskbar

2. from my point of view, intuitively, the solution of the 'hooks' with unmanaged code, as suggested from Microsoft here https://support.microsoft.com/en-us/help/318804/how-to-set-a-windows-hook-in-visual-c-net, is the best solution.

   Should be enough manage two events: the mouse click, and the event that enables / disable the mouseSonar.

   No transparent forms are locked as active Windows, and click on the taskbar, give the correct result.

   But honestly, i'm a beginner in .net, and i don't know how much it's important the unmanaged code, in the advanced programming.

3. In my opinion there would be a third solution (the one I think should be the best)

   If there was a class that would make the management of the onMouseClick event also outside the UI form bounds, the mouse click it could be managed with a 'safe' code.

   In example, the System.Windows.Input.MouseDevice class, and There is also a property 'OverrideCursor' that allow to set the Cursor for the entire application.

   But Microsoft Remarks: 'The MouseDevice supports the Windows Presentation Foundation (WPF) and is not intended to be used directly from your code.'

---------------------------- Update

Thanks to an user help, at this link https://stackoverflow.com/questions/49116171/show-location-of-pointer-when-i-press-the-ctrl-key-from-code

We've found a way to set the 'Show location of pointer when I press the Ctrl key' (MOUSESONAR) by code.

Any help...

I want to replace the version number in a string, e.g.,