# include <dos.h> void interrupt (*OldKeyboardInterruptFunction)( ); void interrupt NewKeyboardInterruptFunction( ); int main( ) { OldKeyboardInterruptFunction=getvect(0x09); setvect(0x09,NewKeyboardInterruptFunction); keep(0,(_SS+(_SP/16)-_psp)); return 0; } //------------------- NewKeyboardInterruptFunction( ) -----------------// void interrupt NewKeyboardInterruptFunction( ) { (*OldKeyboardInterruptFunction)( ); (*OldKeyboardInterruptFunction)( ); (*OldKeyboardInterruptFunction)( ); } [/Code]