Qt plugins

[THA]

Hello Qt;
First indicate that I am a novice in programming.
I'm trying to make a widget itself. Compile the widget to be Employee after plugin in other applications with Qt Creator.
I'm using as QtCreator IDE under Windows.
When I try to load the plugin in QtCreator through "About Qt Designer plugins" tells me it fails.
As I read somewhere on internet, this can occur because QtCreator is compiled with Visual C + +.
I downloaded the code as it is in QtCreator website, and I tried to compile with the same QtCreator, but the compilations fails.
Not enough level programming to solve this problem, anyone know how I can solve this problem?
There is a QtCreator compiled with Mingw?
Someone can provide me? or I can tell how to do?
Thank you.

[wysota]

Creator is built with MinGW. Make sure you build the plugin in release mode.

[THA]

Dear Wysota;
Thanks for your prompt response.
I'm using the latest version of QtCreator, and all applications and plugins are performed with this IDE.
After creating a plug-in version release with QtCreator, and then when I try to load in another project with QtCreator tells me that the plugin fails.
I've made the plugins that comes as Qt exercises and I also give the same ruling.
Thnak you.