Dear gianantonio.garau: On Oct 13, 9:35 am, 'gianantonio.garau' wrote: >Hi, >>i have old programs in clipper summer 87. >>Trinity Rising Elspeth Cooper Ebook. In many new windows64bit os they doesn't work! >( vista 64,win7 64,win 2008 64 ),reason: >windows cannot execute 16 bit applications. >>How can compile in 32 bit? Harbour or xHarbour. But S87 code is different than Clipper 5.3 code, so you would spend much time in converting. If you have the professional version of Win7, you can download Virtual PC from Microsoft, and it has a 32-bit copy of WinXP that it runs, that will in turn run your 16-bit program.