This is probably a problem experienced and solved a million times already, but I haven't been able to find a thread that has helped yet, so here I go:

I am trying to use QWT for the first time. I have Qt 4.6.0, and QWT 5.2.0, on Windows XP. I downloaded QWT and built "qwt" and "qwt_designer_plugin" using Visual Studio 2008. I then copied qwt_designer_plugin5.dll .exp and .lib into my <QTDIR>\plugins\designer directory. (I don't know if the .exp is really needed). Upon opening Qt Designer, the QWT plugins are not available, and under Plugin Information, the qwt_designer_plugin5.dll is under the Faild Plugins with this error:

Cannot load library C:/Qt/4.60/plugins/designer/qwt_designer_plugin5.dll: The specified module could not be found.

I tried moving .dlls into the <QTDIR>\plugins\designer directory as needed to make the qwt_designer_plugin5.dll "happy" in dependency walker, but this didn't change anything.

Any help you can give would be much appreciated!