I am looking for a way to paste an image (like an error image) in a rich text editor in Sharepoint 2010 or in another field list without having to upload it first in a library (this costs a lot of time), but I have not yet found any solution
SharePoint is a server platform, so if you paste an image into your browser, it is not stored on the server. That is why you need to save your image before you can use it.
You can create a custom solution with ActiveX in order to create some kind of text field where you can paste an image.
More info here:
http://www.codeproject.com/KB/graphics/ClipboardActiveX.aspx Regards, Marijn Somers|| SharePoint Consultant- MCTS SharePoint 2007, 2010 configuring http://www.beyond-it.be || Twitter: http://twitter.com/marijnsomers || http://marijnsomers.blogspot.com