> Maybe one more question: is it true if I assume that when using any cocntrol from the "ExtCtrls" unit, the Interfaces unit is required even when the components used are not visible ?
Yes. Interfaces unit is the unit that links LCL with the chosen GUI library backend. -- View this message in context: http://free-pascal-lazarus.989080.n3.nabble.com/Lazarus-Linker-errors-tp4035393p4035407.html Sent from the Free Pascal - Lazarus mailing list archive at Nabble.com. -- _______________________________________________ Lazarus mailing list Lazarus@lists.lazarus.freepascal.org http://lists.lazarus.freepascal.org/mailman/listinfo/lazarus
