Developer discussions (mainly user-mode)

2026-09-07: UltraVNC Extend Display: https://uvnc.com/products/ultravnc-extend-display.html | viewtopic.php?t=38201

2026-09-07: After more 5 000 000 (five million) views on forum for 1.8.x.x development versions...
A new stable version, UltraVNC 1.8.2.9 has been released: viewtopic.php?t=38203
Feedback is always welcome

2026-04-01: After 1.7.x, 1.8.x release builds need tests and feedback: viewtopic.php?t=38158

2026-03-11: CVE-2026-3787 and CVE-2026-4962 - Clarification: viewtopic.php?t=38155

2025-12-02: We need help: English Wikipedia UltraVNC page has been requested to deletion: viewtopic.php?t=38127
Any help is welcome to improve the UltraVNC page and/or to comment on the Wikipedia Talk page

2025-06-25: After more 2 000 000 (two million) views on forum for 1.5.0.x development versions... and 1.6.1.0, 1.6.3.0-dev versions
A new stable version, UltraVNC 1.6.4.0 and UltraVNC SC 1.6.4.0 have been released: viewtopic.php?t=38095
Feedback is always welcome

2025-05-06: Forum password change request: viewtopic.php?t=38078

2023-09-21: Important: Please update to latest version before to create a reply, a topic or an issue: viewtopic.php?t=37864

Development: UltraVNC development is always here... Any help is welcome
Feedback is welcome

Help is very needed for:
Windows ARM/ARM64 support: viewtopic.php?t=38163 / https://github.com/ultravnc/UltraVNC/issues/346
macOS support: viewtopic.php?t=38164 / https://github.com/ultravnc/UltraVNC/issues/347
Linux support: viewtopic.php?t=38165 / https://github.com/ultravnc/UltraVNC/issues/348
*BSD support: viewtopic.php?t=38166 / https://github.com/ultravnc/UltraVNC/issues/349
*Solaris support: viewtopic.php?t=38167 / https://github.com/ultravnc/UltraVNC/issues/350

Developer discussions (mainly user-mode)

New Topic

113 topics

Announcements

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Last post

UltraVNC 1.8.2.9 Released

Last post by Ludovic « 2026-09-08 19:05
Posted in Announcements

by Ludovic » 2026-09-08 19:05 » in Announcements

0 Replies

6612 Views

Last post by Ludovic
2026-09-08 19:05
UltraVNC 1.8.X.X - Feedback

Last post by ddbivens « 2026-09-11 01:28
Posted in 1.8.x
Replies: 143
by RudiDeVos » 2026-03-26 21:19 » in 1.8.x
1

2

3

4

5
143 Replies

5681831 Views

Last post by ddbivens
2026-09-11 01:28
Celebrating the 23th anniversary of the UltraVNC (26th anniversary since the laying of the foundation stone)

Last post by Ludovic « 2025-12-05 11:12
Posted in Announcements

by Ludovic » 2025-12-05 11:12 » in Announcements

0 Replies

1306993 Views

Last post by Ludovic
2025-12-05 11:12
Poll: Renaming UltraVNC files and service to be more clear

Last post by Ludovic « 2025-12-03 20:20
Posted in Announcements

by Ludovic » 2025-12-03 20:20 » in Announcements

0 Replies

1016416 Views

Last post by Ludovic
2025-12-03 20:20
Important: Please update to latest version before to create a reply, a topic or an issue

Last post by Ludovic « 2023-09-21 10:06
Posted in Announcements

by Ludovic » 2023-09-21 10:06 » in Announcements

0 Replies

1755615 Views

Last post by Ludovic
2023-09-21 10:06

Topics

Replies

Views

Last post

windows flickers

Last post by Ludovic « 2026-02-15 12:08
Replies: 1
by JSLindo » 2025-07-17 11:09

1 Replies

1275602 Views

Last post by Ludovic
2026-02-15 12:08
VS2022 Zlib Compile Error

Last post by RudiDeVos « 2025-02-20 21:15
Replies: 1
by colleanTip » 2025-02-20 11:41

1 Replies

274449 Views

Last post by RudiDeVos
2025-02-20 21:15
Is it possible Configuring UltraVNC Server Properties During Installation?

Last post by plankton « 2025-02-17 07:31

by plankton » 2025-02-17 07:31

0 Replies

76366 Views

Last post by plankton
2025-02-17 07:31
Unknown server message type when connecting to UltraVNC server

Last post by JFarlette « 2025-01-21 07:20

by JFarlette » 2025-01-21 07:20

0 Replies

112127 Views

Last post by JFarlette
2025-01-21 07:20
Questions about latest version

Last post by kdh4318 « 2025-01-20 07:42
Replies: 3
by kdh4318 » 2024-12-11 11:22

3 Replies

95461 Views

Last post by kdh4318
2025-01-20 07:42
Debug Assertion Failed

Last post by RudiDeVos « 2024-11-25 19:44
Replies: 1
by kdh4318 » 2024-11-21 07:50

1 Replies

90717 Views

Last post by RudiDeVos
2024-11-25 19:44
Network security altering repeater protocol

Last post by RudiDeVos « 2024-04-15 18:33
Replies: 1
by harry999 » 2024-04-14 21:03

1 Replies

105015 Views

Last post by RudiDeVos
2024-04-15 18:33
Developer wanted

Last post by Ludovic « 2023-12-25 22:20
Replies: 1
by d4t3r » 2017-10-12 12:34

1 Replies

100868 Views

Last post by Ludovic
2023-12-25 22:20
Cannot open include file: 'stddef.h': No such file or direct

Last post by Ludovic « 2023-12-25 22:02
Replies: 3
by aaron.pedigo » 2019-12-11 14:37

3 Replies

100629 Views

Last post by Ludovic
2023-12-25 22:02
I can't find the source code for the Virtual Display driver

Last post by RudiDeVos « 2023-04-23 20:39
Replies: 3
by pillose » 2023-04-22 13:15

3 Replies

114494 Views

Last post by RudiDeVos
2023-04-23 20:39
JWT token refresh automatize in Alteryx?

Last post by pavanznmd « 2022-09-08 10:53

by pavanznmd » 2022-09-08 10:53

0 Replies

92822 Views

Last post by pavanznmd
2022-09-08 10:53
How does file transfer work?

Last post by constatinus « 2022-03-22 22:54
Replies: 2
by constatinus » 2022-03-22 18:46

2 Replies

107964 Views

Last post by constatinus
2022-03-22 22:54
Compiling source code in Visual Studio 2017

Last post by RudiDeVos « 2022-03-21 17:04
Replies: 4
by Drondinpa » 2022-03-15 08:07

4 Replies

93763 Views

Last post by RudiDeVos
2022-03-21 17:04
Viewer crash while doing folder zip to transfer

Last post by RudiDeVos « 2021-11-04 21:26
Replies: 1
by vineeta1shukla » 2015-06-28 14:17

1 Replies

105046 Views

Last post by RudiDeVos
2021-11-04 21:26
Listen shortcut loading wrong plugin

Last post by RudiDeVos « 2021-11-04 21:26
Replies: 1
by Noreaster » 2018-12-11 02:40

1 Replies

92545 Views

Last post by RudiDeVos
2021-11-04 21:26
Start two winvnc service instances parallel

Last post by RudiDeVos « 2021-11-04 21:25
Replies: 2
by Thohoj » 2016-07-01 06:59

2 Replies

103241 Views

Last post by RudiDeVos
2021-11-04 21:25
Code quality

Last post by RudiDeVos « 2021-11-04 20:42
Replies: 1
by RomekAtomek » 2020-07-07 23:15

1 Replies

94911 Views

Last post by RudiDeVos
2021-11-04 20:42
winvnc.exe crashes with two monitors, analysis & patch

Last post by RudiDeVos « 2021-11-02 19:34
Replies: 2
by hsmeier » 2017-03-02 10:07

2 Replies

107876 Views

Last post by RudiDeVos
2021-11-02 19:34
vncViewer 1.2.4.0 ABORT on CHAT

Last post by RudiDeVos « 2021-09-23 20:18
Replies: 7
by splintercode » 2020-02-13 11:30

7 Replies

140975 Views

Last post by RudiDeVos
2021-09-23 20:18
LoadLibrary

Last post by RudiDeVos « 2021-09-22 18:37
Replies: 1
by RomekAtomek » 2020-07-03 19:46

1 Replies

93267 Views

Last post by RudiDeVos
2021-09-22 18:37
Code quality

Last post by RudiDeVos « 2021-09-22 18:37
Replies: 1
by RomekAtomek » 2020-07-06 17:01

1 Replies

99034 Views

Last post by RudiDeVos
2021-09-22 18:37
Script: Check if VNC-Server is frozen

Last post by Rhino Cracker « 2021-02-28 08:49

by Rhino Cracker » 2021-02-28 08:49

0 Replies

93774 Views

Last post by Rhino Cracker
2021-02-28 08:49
Small patch proposed

Last post by Neustradamus « 2020-09-26 01:42
Replies: 2
by Peter2121 » 2020-04-24 09:18

2 Replies

96158 Views

Last post by Neustradamus
2020-09-26 01:42
Missing source files?

Last post by RudiDeVos « 2019-12-19 19:24
Replies: 3
by aaron.pedigo » 2019-12-17 15:00

3 Replies

102033 Views

Last post by RudiDeVos
2019-12-19 19:24
Issues compiling UltraVNC

Last post by RudiDeVos « 2019-11-29 19:14
Replies: 7
by yo_mono » 2019-09-15 02:52

7 Replies

119033 Views

Last post by RudiDeVos
2019-11-29 19:14
Recommended set up for development on windows 10?

Last post by RudiDeVos « 2019-11-04 12:25
Replies: 1
by jsuhhome1 » 2019-10-30 21:24

1 Replies

95483 Views

Last post by RudiDeVos
2019-11-04 12:25
r1245

Last post by RudiDeVos « 2019-10-15 19:54
Replies: 1
by thegaffer14 » 2019-10-14 11:33

1 Replies

90688 Views

Last post by RudiDeVos
2019-10-15 19:54
Problem vncviewer V1238

Last post by RudiDeVos « 2019-09-18 20:27
Replies: 1
by thegaffer14 » 2019-09-18 16:08

1 Replies

84620 Views

Last post by RudiDeVos
2019-09-18 20:27
Compiling v1238

Last post by RudiDeVos « 2019-09-18 20:13
Replies: 1
by thegaffer14 » 2019-09-18 14:42

1 Replies

84172 Views

Last post by RudiDeVos
2019-09-18 20:13
Unable to build winvnc in VS 2008

Last post by Warnershots « 2019-01-14 21:08
Replies: 9
by IT researcher » 2016-08-03 07:33

9 Replies

153725 Views

Last post by Warnershots
2019-01-14 21:08
Unable to Build VC2010

Last post by RudiDeVos « 2018-12-06 08:01
Replies: 13
by Prelude101 » 2018-11-30 21:41

13 Replies

184318 Views

Last post by RudiDeVos
2018-12-06 08:01
Modifications to UltraVNC

Last post by LarryM « 2018-11-15 23:02
Replies: 4
by LarryM » 2018-11-15 03:06

4 Replies

104616 Views

Last post by LarryM
2018-11-15 23:02
Regarding Enable Blank Monitor on Viewer Request

Last post by RudiDeVos « 2017-07-25 08:49
Replies: 1
by ritj2003 » 2017-07-25 01:58

1 Replies

94323 Views

Last post by RudiDeVos
2017-07-25 08:49
System blocked after quit Connection

Last post by RudiDeVos « 2016-11-28 21:40
Replies: 3
by comfine » 2016-08-25 13:31

3 Replies

115823 Views

Last post by RudiDeVos
2016-11-28 21:40
Crash app in C# .NET 4.X

Last post by shsouza « 2016-11-23 17:36
Replies: 3
by romigrabarz » 2016-08-09 06:36

3 Replies

102492 Views

Last post by shsouza
2016-11-23 17:36
UltraVNC SC

Last post by larytet « 2016-09-12 09:20
Replies: 4
by larytet » 2016-09-08 09:41

4 Replies

126902 Views

Last post by larytet
2016-09-12 09:20
Speed issue in Ultra VNC with repeater mode III

Last post by Bedazzled « 2016-08-28 04:17
Replies: 2
by IT researcher » 2016-08-26 11:36

2 Replies

99130 Views

Last post by Bedazzled
2016-08-28 04:17
How to setup UltraVNC repeater mode SSL (SCIII)

Last post by IT researcher « 2016-08-23 05:02

by IT researcher » 2016-08-23 05:02

0 Replies

108843 Views

Last post by IT researcher
2016-08-23 05:02
Uvnc to connect a server which is working behind a proxy

Last post by RudiDeVos « 2016-08-10 21:20
Replies: 3
by IT researcher » 2016-08-10 06:04

3 Replies

108284 Views

Last post by RudiDeVos
2016-08-10 21:20
[bug] UVNC hangs when session is opened by tscon.exe

Last post by alexchandel « 2016-07-27 21:26

by alexchandel » 2016-07-27 21:26

0 Replies

96602 Views

Last post by alexchandel
2016-07-27 21:26
Change service_name of uvnc server in service mode

Last post by Thohoj « 2016-07-01 06:59
Replies: 1
by Thohoj » 2016-06-30 08:26

1 Replies

96865 Views

Last post by Thohoj
2016-07-01 06:59
Client is freezing 1 time per a day

Last post by VeryImportantPerson « 2016-06-23 12:00

by VeryImportantPerson » 2016-06-23 12:00

0 Replies

95556 Views

Last post by VeryImportantPerson
2016-06-23 12:00
VNC Server Source Code

Last post by IGotLagg « 2016-04-08 14:30
Replies: 4
by IGotLagg » 2016-04-08 08:38

4 Replies

132841 Views

Last post by IGotLagg
2016-04-08 14:30
Can UltraVNC handle partial messages?

Last post by RudiDeVos « 2015-12-05 16:02
Replies: 2
by vnc_novice » 2015-12-03 07:09

2 Replies

104984 Views

Last post by RudiDeVos
2015-12-05 16:02
Limit 32bit version to SSE

Last post by RudiDeVos « 2015-11-27 16:47
Replies: 5
by Maniaxx » 2015-11-26 22:02

5 Replies

119729 Views

Last post by RudiDeVos
2015-11-27 16:47
auto scroll

Last post by RudiDeVos « 2015-10-25 22:35
Replies: 1
by g10 » 2015-10-23 22:10

1 Replies

92432 Views

Last post by RudiDeVos
2015-10-25 22:35
High Data Consumption when UltraVNC Client is minimized

Last post by michaeluray « 2015-06-01 15:41
Replies: 3
by michaeluray » 2014-10-17 10:01

3 Replies

109901 Views

Last post by michaeluray
2015-06-01 15:41
UVNC Mirror dricer

Last post by RudiDeVos « 2015-05-07 21:26
Replies: 2
by ananthonline » 2015-05-06 21:51

2 Replies

109037 Views

Last post by RudiDeVos
2015-05-07 21:26
Non-MSVS buildsystems

Last post by LRN « 2015-04-23 15:10

by LRN » 2015-04-23 15:10

0 Replies

93939 Views

Last post by LRN
2015-04-23 15:10
Problem with too many full frame updates at start

Last post by RudiDeVos « 2015-03-22 20:54
Replies: 3
by tobybuk » 2015-03-06 21:36

3 Replies

82114 Views

Last post by RudiDeVos
2015-03-22 20:54

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