DosFreeSeg()                  Free memory block allocated with DosAllocSeg() or DosAllocHuge().
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 Function : Free a memory block allocated with DosAllocSeg() or
            DosAllocHuge().

 Syntax   : USHORT BLXAPI DosFreeSeg(SEL selector);

 selector   Protected mode selector of a memory block allocated through
            DosAllocSeg() or DosAllocHuge().

 Return   : None

 This function is used to free memory blocks allocated through DosAllocSeg()
 or DosAllocHuge() and should not be used to free any other type of selector.

 Example:

    #include <stdlib.h>
    #include <stdio.h>
    #include <string.h>
    #include <blx286.h>
    void main (void)
    {
    SEL         selector;
    /* Allocate a 4KB block */
    if (DosAllocSeg(4096, &selector, 0) != 0)
       {
       printf("DosAllocSeg() failed\n");
       exit(255);
       }
    printf("4 Kb block allocated at : %04X\n",selector);
    if (DosFreeSeg(selector) != 0)
       {
       printf("DosFreeSeg() failed - selector = %04X\n", 
          selector);
       exit(254);
       }
    }