# tow version different of OpenCV **URL:** \ **Category:** C++\ **Created:** [November 4, 2021, 7:22pm UTC](https://forum.opencv.org/t/tow-version-different-of-opencv/6059 "2021-11-04T19:22:13Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![ali89](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/ali89/32/3677_2.png) [@ali89](https://forum.opencv.org/u/ali89)\ **Post date:** [November 4, 2021, 7:22pm UTC](https://forum.opencv.org/t/tow-version-different-of-opencv/6059/1 "2021-11-04T19:22:13Z")
Hello, How I can use tow version different of OpenCV in the same Visual Studio 2010 project? thank ---
**Author:** ![berak](https://avatars.discourse-cdn.com/v4/letter/b/85f322/32.png) [@berak](https://forum.opencv.org/u/berak)\ **Post date:** [November 4, 2021, 7:40pm UTC](https://forum.opencv.org/t/tow-version-different-of-opencv/6059/2 "2021-11-04T19:40:12Z")
that seems to be a very bad idea, please explain, why you think, you need that ---
**Author:** ![ali89](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.opencv.org/ali89/32/3677_2.png) [@ali89](https://forum.opencv.org/u/ali89)\ **Post date:** [November 5, 2021, 2:20pm UTC](https://forum.opencv.org/t/tow-version-different-of-opencv/6059/3 "2021-11-05T14:20:18Z")
I have a project using VS2010, and I used Open CV 2.5, on the other hand, I am developing a new algorithm, and I need opencv 4.5, but without removing opencv2. 5 in the project because I can’t change all in my project code ---
**Author:** ![berak](https://avatars.discourse-cdn.com/v4/letter/b/85f322/32.png) [@berak](https://forum.opencv.org/u/berak)\ **Post date:** [November 5, 2021, 3:18pm UTC](https://forum.opencv.org/t/tow-version-different-of-opencv/6059/4 "2021-11-05T15:18:49Z")
you could try to split it into 2 projects, put the legacy code into a dll (and link only that to older opencv), and your current algo into main