That is very strange, didn't notice that… I've just reinstalled version 10.29, did a rebuild and strangely enough the problem seems to be gone now. The compiled DLL is bigger now too. Perhaps something went wrong during the installation of the alphacontrols the first time or it was some kind of compiler error, maybe a corrupt .dcu? I did create multiple test applications that day so I am certain that the DLL in the attachment was compiled with the sCombobox unit. If the problem occurs again i'll try to get you some more information.