I searched my system and found QtCore4.dll and
QtGui4.dll here C:\Qt\2010.04\qt\bin and here C:\Qt\2010.04\bin. Presumably the 4 is a later version?
Additionally I included those directories in the project PATH build environment. and removed the reference to LIBS += -l<QLabel> in the pro file becuase I added that to see if it would fix it. If I do add the LIBS += -l<QLabel> referecne, I get build error " cannot find the file specified" debug\fridgemagnets.exe] Error 1
Thanks