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Labels can be used in in-line assembly code.  Here is an example.

Example:

     extern void _disable_video( unsigned );
     #pragma aux _disable_video =    \
      "again: in al,dx"              \
             "test al,8"             \
             "jz again"              \
             "mov dx,03c0h"          \
             "mov al,11h"            \
             "out dx,al"             \
             "mov al,0"              \
             "out dx,al"             \
             parm [dx]               \
             modify [al dx];