http://www.ousob.com --- Legacy Redefined #include <dos.h> #include <extend50.h> CLIPPER b_share() { int retVal = 0; union REGS regs; regs.h.ah = 0x10; regs.h.al = 0; int86(0x2f,&regs,&regs); if( regs.h.al == 0xFF ){ retVal = 1; } _retl(retVal); }