Install this application called OSCPoint
OSCPoint: An OSC API for PowerPoint
Here is the GitHUB page and a link to a list of actions you can do. This page will show the "NEXT" slide option as its the most common one.
oscpoint/ACTIONS.md at main · phuvf/oscpoint
1> Install the application, and it should appear in your PowerPoint tool bar
Open up a PowerPoint with some slides.
Go to QLC -> INPUT/OUPTU tab
Scroll to the OSC section.
If you are running QLC on the same machine as PowerPoint, select 127.0.0.1
If you are using it on a different machine, select the local IP of your computer that is running QLC+
Select INPUT and FEEDBACK
Enter in the feedback port in INPUT PORT of 35550 and port 35551 into both output port sections.
3> Setup a dummy QLC fixture and scene
In order for QLC to toggle a button, we'll create a dummy fixture and scene
In this example, I'm using DMX 1 using a generic dimmer. It can be anything really, i'm using a dummy, non existent light and unused DMX channel
4> Setup the OSC command(s) to be available to QLC
Click on INPUTS/OUTPUTS
Select PROFILE
Select the green + PLUS button
Fill in the description and set the TYPE to OSC
Click on INPUT MAPPING
Click the GREEN button and put in an INPUT CHANNEL of 1
and in the 'name' put /oscpoint/next
Click OK and OK