Is there a way to keep a mouse cursor inside a windowed mode game?

[LegenJerry]

I'm trying to speedrun Dishonored and Livesplit requires the game to be in Windowed Mode for my splits to appear on stream. but I've lost a lot of time because the mouse keeps going outside the window of the game and minimizes the game when I accidentally click outside the window. is there any way to fix this or is Windows 10 to blame?

[ReBoot]

The game is to blame. If it doesn't capture the mouse, then the mouse can leave the game window. To Windows, the game is just another non-fullscreen window.
Try pseudo-fullscreen borderless window. That's still a window, but that window fills the whole desktop so the cursor has nowhere to go.

[1030266537zw]

666