Hi Rodd,

>Does the .fll get completely loaded into memory at that point?

As far as VFP is concerned, the FLL is loaded completely. Windows, however, creates a file-mapping on the DLL. That means, the DLL is loaded into memory, but backed up by the physical file. If memory is sparse, the in-memory copy is thrown away. When needed it's reloaded from the file. For this reason, the FLL remains locked until you unload it.