Windows app with opacity


New Member
I'm wondering if it is possible to create a Windows app with an opaque (not fully transparent) background that can be captured and overlayed on top of other sources in OBS? Any examples of such apps?
What I mean is:

If yes, what kind of development tools can I use to create such an app (GUI frameworks with OpenGL, DirectX etc.)?
From the OBS side: are there any filters (like color keys) that can help me to get such an effect? (e.g. somehow using a special color in my app that will be partially filtered in OBS or smth like that)


New Member

I'm developping an annotation program which provides allows drawing on screen. Some users are enjoying it with OBS. Up to now I've found only a solution to use filters to convert black to transparency, but I would like to upgrade to capture also transparency through game capture but can not find any example which will propose so. Any examples would be welcomed


New Member
I managed to pull it off with an OpenGL library. I assume you can use DirectX/Direct3D in Windows as well.
More specifically, I used the SFML library. You can search for threads about it on the SFML forum.