> > Does nobody know if it's possible to create a library > PLB or .FLL by using the Borland C++ 3.1 compiler? > If it's possible, which switches I have to use? Hi Matteo I had developed PLB AND FLL in 2.x using MS C/C++ Version 7 and not much familar with WATCOM and nor tried developing FLL in VFP but writting my experience which may be useful. When u install Library construction kit, u will fine MAK files for MSC and WATCOM C, and syntax and setting are described in these files for how to build PLB OR FLL. FOR WATCOM c DOSWAT.MAK and WINWAT.MAK are the files used to compile your c program and build library. I found the syntax for building library in MSC AND WATCOM similary though I had not worked on WATCOM C.For example to build PLB in WATCOM you need to type this, after changing WATDIR and FOXDIR values in MAK File if u find values different than the default values. C:\LCK>wmake /f doswat.mak PLBNAME= For windows call winwat.mak, provided your system is installed with Windows SDK along with c compiler. Only changes you had to do to your old c function is add [extern "C"] before calling c functions, which are not compatible with C++. This changes are described in VFP manuals. Thank Q Waheed email:mbws@batelco.com.bh