Some problems about using custom widget in designer!

[furskytl]

Yes,now I can build the project succefully!But I still can't see my customed widget in the designer! I run mingw32-make install ,and find that two files are created in the release folder :neonlightplugin.dll and neonlightplugin.a . What should I do to see my widget in the designer?And another question is that whether should I create the plugin in a new project and then use it in another project or both create and use the custom widget in one project?I can't find the details in the book! I have been trapped by this problem for serveral days.Thanks!!!