adding a library to my project and..how to use it?

[KillGabio]

All you say is correct, but you need to have the .dll file somewhere the application finds it. So as placing it where my .exe is located didnt work I have to add that path so that the application look there for the .dll files.

Maybe my English is so bad you didnt understand me :P

[ChrisW67]

@wysota: Qextserialport is not implemented as a plugin. It is a standard dynamic library, automatically linked at start-up (or optionally a static library).

@Killgabio: Your English is understandable. Your description of exactly what is going on on your machine is probably not complete or accurate because your "solution" does not make technical sense. If we don't get to the bottom of this then you will be back in a while asking why you cannot get your program to run on another, non-development, machine.

Can I suggest that your search your entire machine for copies of qextserialport.dll and qextserialportd.dll and remove all except the copy in your qextserialport build directory. Confirm that your program no longer runs. Then copy the DLL from the qextserialport build directory to the location that yourprogram.exe is in (this is probably not the same place as your source code). Confirm that your executable now runs.

A deployed application (Windows) should ultimately look like:

Program Files/
  My Program/
    myprogram.exe
    qextserialport.dll  // your program's shared components (not plugins)
 
    mingwm10.dll   // for MingW GNU C++ programs
    libgcc_s_dw2-1.dll
 
    qtcore4.dll  // Your required Qt components
    qtgui4.dll
    ...
    sqldrivers/
      qsqlite4.dll
      ...
    imageformats/
      qjepg4.dll
      ...

Program Files/
  My Program/
    myprogram.exe
    qextserialport.dll  // your program's shared components (not plugins)

    mingwm10.dll   // for MingW GNU C++ programs
    libgcc_s_dw2-1.dll

    qtcore4.dll  // Your required Qt components
    qtgui4.dll
    ...
    sqldrivers/
      qsqlite4.dll
      ...
    imageformats/
      qjepg4.dll
      ...

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On your dev machine the Qt and MingW components should be found without copying them, but your program's other shared components will not be found by default.

[KillGabio]

now i don`t need to add the plugins path anymore. I was just confusing things sorry!

Thanks a lot!


PS: Actually all the .dll you mentioned i have allready placed them on me release folder because every two days im testing the advances of the application on another computer, untill today everything was fine but now i cannot understand how to use this other library i downloaded, it driving me crazy actually. If you can have a look (http://www.qtcentre.org/threads/47142-General-Advice)when you have time i ll be pleased think that is going to be one of my last problems :/ greetings!