I'm curious about how the virtual display works, so I attempted to understand the code for the winvnc.
Although I was able to locate the 'UVncVirtualDisplay.dll' file in the UltraVnc installer, I couldn't find its corresponding source code.
Where can I find this source code?
Thanks,
Pillose
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A new stable version, UltraVNC 1.6.4.0 and UltraVNC SC 1.6.4.0 have been released: https://forum.uvnc.com/viewtopic.php?t=38095
Feedback is always welcome
2025-12-05: Celebrating the 23th anniversary of the UltraVNC (26th anniversary since the laying of the foundation stone): https://forum.uvnc.com/viewtopic.php?t=38130
2025-12-03: Could you please complete our poll/survey? Renaming UltraVNC files and service to be more clear: https://forum.uvnc.com/viewtopic.php?t=38128
There was a problem to vote, it is solved now! Thanks in advance!
2025-12-02: We need help: English Wikipedia UltraVNC page has been requested to deletion: https://forum.uvnc.com/viewtopic.php?t=38127
Any help is welcome to improve the UltraVNC page and/or to comment on the Wikipedia Talk page
2025-05-06: Forum password change request: https://forum.uvnc.com/viewtopic.php?t=38078
2023-09-21: Important: Please update to latest version before to create a reply, a topic or an issue: https://forum.uvnc.com/viewtopic.php?t=37864
Development: UltraVNC development is always here... Any help is welcome
Feedback is welcome
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I can't find the source code for the virtual display driver.
- Rudi De Vos
- Admin & Developer

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Re: I can't find the source code for the virtual display driver.
Sorry the virtual driver is free but not open source
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- uvnc2me: https://uvnc2me.com/
- Website: https://uvnc.com/
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- GitHub sourcecode: https://github.com/ultravnc/UltraVNC
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Re: I can't find the source code for the virtual display driver.
May I ask if there is a particular reason why the source code for the virtual driver that works with UltraVNC is not open source, despite the UltraVNC is distributed under the GPL license?
Also, could you let me know if there is a document that you referred to when you made the virtual driver?
Also, could you let me know if there is a document that you referred to when you made the virtual driver?
- Rudi De Vos
- Admin & Developer

- Posts: 6976
- Joined: 2004-04-23 10:21
- Contact:
Re: I can't find the source code for the virtual display driver.
The virtual driver was made for another project, license doesn't allow me to distribute the code.
But 'm allowed to reuse the driver it for ultravnc.
A GPL project can use a non GPL driver no need to make the source public. Driver and UltraVNC are 2 seperated projects.
Check the IndirectDisplay in the DDK
But 'm allowed to reuse the driver it for ultravnc.
A GPL project can use a non GPL driver no need to make the source public. Driver and UltraVNC are 2 seperated projects.
Check the IndirectDisplay in the DDK
UltraVNC links (join us on social networks):
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- OpenHub: https://openhub.net/p/ultravnc
- uvnc2me: https://uvnc2me.com/
- Website: https://uvnc.com/
- Forum: https://forum.uvnc.com/
- GitHub sourcecode: https://github.com/ultravnc/UltraVNC
- Mastodon: https://mastodon.social/@ultravnc
- Bluesky/AT Protocol: https://bsky.app/profile/ultravnc.bsky.social
- Facebook: https://www.facebook.com/ultravnc1
- X/Twitter: https://x.com/ultravnc1
- Reddit community: https://www.reddit.com/r/ultravnc
- OpenHub: https://openhub.net/p/ultravnc
- uvnc2me: https://uvnc2me.com/