Developer discussions (mainly user-mode)

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: https://forum.uvnc.com/viewtopic.php?t=38095
Feedback is always welcome

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

2026-03-11: CVE-2026-3787 and CVE-2026-4962 - Clarification: https://forum.uvnc.com/viewtopic.php?t=38155

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

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

New Topic

113 topics

Announcements

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Last post

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

601464 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

341911 Views

Last post by Ludovic
2025-12-03 20:20
UltraVNC 1.6.4.0 and UltraVNC SC 1.6.4.0 Released

Last post by Ludovic « 2025-06-25 16:38
Posted in Announcements

by Ludovic » 2025-06-25 16:38 » in Announcements

0 Replies

1377948 Views

Last post by Ludovic
2025-06-25 16:38
UltraVNC 1.6.4.0 and UltraVNC SC 1.6.4.0 - Feedback

Last post by Ludovic « 2026-04-08 10:25
Posted in 1.6.x
Replies: 26
by RudiDeVos » 2025-06-22 21:06 » in 1.6.x

26 Replies

2738619 Views

Last post by Ludovic
2026-04-08 10:25
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

1099771 Views

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

Topics

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Last post

Java Viewer Source

Last post by RudiDeVos « 2015-03-16 18:57
Replies: 1
by lebowski » 2015-03-16 13:56

1 Replies

27673 Views

Last post by RudiDeVos
2015-03-16 18:57
Recording and Playing The VNC session

Last post by RudiDeVos « 2014-11-05 13:56
Replies: 3
by Sreejith » 2014-11-05 06:43

3 Replies

33799 Views

Last post by RudiDeVos
2014-11-05 13:56
Compiling WinVNC project

Last post by RudiDeVos « 2014-10-25 10:19
Replies: 5
by rnsudhir » 2014-10-20 10:17

5 Replies

37093 Views

Last post by RudiDeVos
2014-10-25 10:19
1.2.0.3 source code

Last post by RudiDeVos « 2014-09-24 11:39
Replies: 1
by joyr » 2014-09-24 09:52

1 Replies

30129 Views

Last post by RudiDeVos
2014-09-24 11:39
The reason of repeater stop responding

Last post by jerryonnet « 2014-09-13 14:13
Replies: 1
by jerryonnet » 2014-09-12 14:23

1 Replies

23348 Views

Last post by jerryonnet
2014-09-13 14:13
win8hook.dll source code

Last post by RudiDeVos « 2014-09-05 07:51
Replies: 1
by Engine47 » 2014-09-04 14:57

1 Replies

16489 Views

Last post by RudiDeVos
2014-09-05 07:51
rfbFileTransferProtocol

Last post by RudiDeVos « 2014-09-01 19:17
Replies: 1
by pyromanci » 2014-09-01 18:08

1 Replies

16238 Views

Last post by RudiDeVos
2014-09-01 19:17
1.2.0.1 MSI installer

Last post by zigurds_kreslins « 2014-08-05 11:22

by zigurds_kreslins » 2014-08-05 11:22

0 Replies

12839 Views

Last post by zigurds_kreslins
2014-08-05 11:22
blacklist timeout increase

Last post by RudiDeVos « 2014-03-31 20:14
Replies: 2
by szymon.nowak » 2014-03-23 10:18

2 Replies

13982 Views

Last post by RudiDeVos
2014-03-31 20:14
Get file from server (.net, asp.net)

Last post by RudiDeVos « 2014-03-19 12:31
Replies: 1
by massa95 » 2014-03-19 12:02

1 Replies

16031 Views

Last post by RudiDeVos
2014-03-19 12:31
1.1.9.6 Repeater disconnects waiting servers and clients

Last post by RudiDeVos « 2014-02-26 22:28
Replies: 9
by kobruleht » 2014-02-23 09:35

9 Replies

27524 Views

Last post by RudiDeVos
2014-02-26 22:28
Error: Usersize 0 is written to log file after every 5 secs

Last post by kobruleht « 2014-02-17 12:26
Replies: 2
by kobruleht » 2014-02-16 20:02

2 Replies

13581 Views

Last post by kobruleht
2014-02-17 12:26
cant type sme letters on client pc

Last post by RudiDeVos « 2014-02-13 13:54
Replies: 1
by garavi1983 » 2014-02-12 14:25

1 Replies

11818 Views

Last post by RudiDeVos
2014-02-13 13:54
winvnc.exe is malicious??

Last post by winman « 2013-12-23 14:35
Replies: 2
by winman » 2013-12-07 05:48

2 Replies

13175 Views

Last post by winman
2013-12-23 14:35
Some reports on VncViewer

Last post by RudiDeVos « 2013-12-10 18:20
Replies: 3
by zaksoft » 2013-12-08 12:19

3 Replies

14406 Views

Last post by RudiDeVos
2013-12-10 18:20
activex dll interface - hide cursor

Last post by RudiDeVos « 2013-11-22 14:53
Replies: 1
by ilebizard » 2013-11-22 13:34

1 Replies

11997 Views

Last post by RudiDeVos
2013-11-22 14:53
how to increase the list of HOST SC

Last post by oswaldo.biolo « 2013-10-15 12:39
Replies: 2
by oswaldo.biolo » 2013-10-11 16:35

2 Replies

12855 Views

Last post by oswaldo.biolo
2013-10-15 12:39
uVNC server to remote launch vncviewer

Last post by RudiDeVos « 2013-10-14 16:12
Replies: 1
by Mahapia » 2013-10-14 13:55

1 Replies

11316 Views

Last post by RudiDeVos
2013-10-14 16:12
Windows 8 & Visual Studio

Last post by abdelghani « 2013-09-06 15:54
Replies: 2
by abdelghani » 2013-05-19 19:17

2 Replies

13079 Views

Last post by abdelghani
2013-09-06 15:54
can I call VNC function from in a VB2010 program?

Last post by BigChimip « 2013-07-12 11:23
Replies: 1
by sorex » 2013-06-23 19:41

1 Replies

13847 Views

Last post by BigChimip
2013-07-12 11:23
Must have downgrade to 1.0.6.5

Last post by atomzenitram « 2013-07-05 15:39

by atomzenitram » 2013-07-05 15:39

0 Replies

10082 Views

Last post by atomzenitram
2013-07-05 15:39
Ultra VNC Server hooks + second Hook

Last post by tatane16 « 2013-05-23 06:31
Replies: 2
by tatane16 » 2013-05-22 10:52

2 Replies

12628 Views

Last post by tatane16
2013-05-23 06:31
C# Embedded uVNC Client & Server

Last post by Saldash « 2013-05-09 00:15

by Saldash » 2013-05-09 00:15

0 Replies

8930 Views

Last post by Saldash
2013-05-09 00:15
File transfer blocks UI messages

Last post by Jules Fettu « 2013-05-02 12:32
Replies: 5
by jhansen » 2013-04-22 22:48

5 Replies

46317 Views

Last post by Jules Fettu
2013-05-02 12:32
Viewer is blank when you disable "Share the Server" option

Last post by RudiDeVos « 2013-04-11 19:39
Replies: 2
by jhansen » 2013-04-10 03:01

2 Replies

15983 Views

Last post by RudiDeVos
2013-04-11 19:39
Viewer crash when network error & dialogs

Last post by RudiDeVos « 2013-03-23 09:44
Replies: 10
by jhansen » 2013-03-16 14:28

10 Replies

24017 Views

Last post by RudiDeVos
2013-03-23 09:44
can ultravnc support android?

Last post by Bonji « 2013-03-05 19:40
Replies: 1
by cao kai » 2013-03-02 16:19

1 Replies

7570 Views

Last post by Bonji
2013-03-05 19:40
How to Use UltraVNC under Delphi 2010

Last post by RudiDeVos « 2013-01-14 14:24
Replies: 1
by sheshman » 2013-01-11 20:32

1 Replies

7589 Views

Last post by RudiDeVos
2013-01-14 14:24
Singleclick uploader how it works

Last post by RudiDeVos « 2013-01-13 13:08
Replies: 1
by lkjlkjlkj » 2013-01-12 19:01

1 Replies

7621 Views

Last post by RudiDeVos
2013-01-13 13:08
Rework

Last post by macintouch « 2012-12-24 09:16

by macintouch » 2012-12-24 09:16

0 Replies

5665 Views

Last post by macintouch
2012-12-24 09:16
How to transfer files with dlls or APIs??

Last post by RudiDeVos « 2012-11-15 08:11
Replies: 1
by dkalra_sam » 2012-11-15 06:37

1 Replies

7244 Views

Last post by RudiDeVos
2012-11-15 08:11
C++ Developer, UltraVNC Project

Last post by quickrcr « 2012-11-05 12:31

by quickrcr » 2012-11-05 12:31

0 Replies

5632 Views

Last post by quickrcr
2012-11-05 12:31
Mirror Display Questions

Last post by vbguyny « 2012-08-26 20:09
Replies: 4
by vbguyny » 2012-08-23 03:08

4 Replies

10787 Views

Last post by vbguyny
2012-08-26 20:09
Error while compiling winvnc

Last post by BigChimip « 2012-08-23 14:27
Replies: 7
by winman » 2012-08-09 05:47

7 Replies

15585 Views

Last post by BigChimip
2012-08-23 14:27
Repeater port getting closed

Last post by winman « 2012-08-22 14:29

by winman » 2012-08-22 14:29

0 Replies

5814 Views

Last post by winman
2012-08-22 14:29
error while trying to digital sign winvnc.exe

Last post by winman « 2012-08-13 06:43
Replies: 2
by winman » 2012-08-08 12:28

2 Replies

8125 Views

Last post by winman
2012-08-13 06:43
Error while compiling winvnc2

Last post by winman « 2012-08-13 06:34
Replies: 2
by winman » 2012-08-08 12:24

2 Replies

7893 Views

Last post by winman
2012-08-13 06:34
Patch to get the Option Key working on OSX connections

Last post by gjpc « 2012-06-26 00:14

by gjpc » 2012-06-26 00:14

0 Replies

5381 Views

Last post by gjpc
2012-06-26 00:14
How to launch vnc viewer with VB6 or shell.

Last post by Bohong Wang « 2012-05-16 03:10

by Bohong Wang » 2012-05-16 03:10

0 Replies

5456 Views

Last post by Bohong Wang
2012-05-16 03:10
1SCDLL.dll in C# Application

Last post by ali_spindler « 2012-04-23 14:28

by ali_spindler » 2012-04-23 14:28

0 Replies

5025 Views

Last post by ali_spindler
2012-04-23 14:28
Windows 7

Last post by eranbx « 2012-03-20 00:43

by eranbx » 2012-03-20 00:43

0 Replies

4848 Views

Last post by eranbx
2012-03-20 00:43
How To Submit Bug Fixes?

Last post by yn0t « 2012-03-08 21:55

by yn0t » 2012-03-08 21:55

0 Replies

4797 Views

Last post by yn0t
2012-03-08 21:55
How do diffrent reconnection

Last post by setur « 2012-03-06 08:48
Replies: 1
by setur » 2012-02-24 07:32

1 Replies

5676 Views

Last post by setur
2012-03-06 08:48
How to find Ultravnc Viewer Registry Entry Path

Last post by martinx « 2012-02-16 15:21

by martinx » 2012-02-16 15:21

0 Replies

4647 Views

Last post by martinx
2012-02-16 15:21
ULTR@VNC VIEWER ACTIVEX CONTROL

Last post by sbayana « 2012-01-13 18:43

by sbayana » 2012-01-13 18:43

0 Replies

4428 Views

Last post by sbayana
2012-01-13 18:43
Control uvnc_service with user privileges

Last post by B « 2012-01-06 19:39
Replies: 7
by 4bst1n3nz » 2012-01-03 14:08

7 Replies

15791 Views

Last post by B
2012-01-06 19:39
How to save myframebuffer as a bmp file

Last post by robingchan « 2011-11-03 13:13
Replies: 2
by peterpansh » 2011-06-11 03:53

2 Replies

5989 Views

Last post by robingchan
2011-11-03 13:13
Revolving Password

Last post by supercoe « 2011-10-18 22:05
Replies: 4
by ninefofo » 2011-10-14 15:32

4 Replies

8228 Views

Last post by supercoe
2011-10-18 22:05
VNC viewer API in Visual Studio

Last post by zaleo « 2011-10-15 18:45

by zaleo » 2011-10-15 18:45

0 Replies

4463 Views

Last post by zaleo
2011-10-15 18:45
Patch/Update VNCViewer help options VNCOptions.cpp line 1196

Last post by BigChimip « 2011-10-14 03:10

by BigChimip » 2011-10-14 03:10

0 Replies

4098 Views

Last post by BigChimip
2011-10-14 03:10

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