Hide cursor on Player window

[Ajgor]

Hello. I create a specific player in C# WPF using libVLCSharp, that has a controll pannel on one monitor, and player window on second monitor. I would like to complettely swotch off the cursor (mouse pointer), when it is dragging over the player window. Unfortunatelly, when I drag the cursor over the player, it is visible for about one - two seconds, and then dissapears. I would like to avoid it. I tried to swith off cursor over the main WPF window that containsthe player, and over embedded VLC player, but it does not work. Until there is no miedia file, the cursor is invisible, but while I load any video, the cursor appears.
How to achive this?

[mfkl]

maybe try --mouse-hide-timeout=0
https://wiki.videolan.org/VLC_command-line_help/