DosGetSegLimit()              Get size limit of segment selector.
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 Function : Get the size limit of a segment selector.

 Syntax   : USHORT BLXAPI DosGetSegLimit( SEL selector,
            PULONG seglimit);

 selector   A valid selector number.

 seglimit   Pointer to a long integer to receive the size limit of the
            selector.

 Return   : The segment limit of the specified selector.

 The segment limit is the highest offset within a segment that can be
 addressed.

 Example:

    #include <stdlib.h>
    #include <stdio.h>
    #include <string.h>
    #include <blx286.h>
    #define VID_BUF 0xB800
    #define VID_SIZE 0x8000l
    void main (void)
    {
    SEL         video_buffer;
    ULONG       seglimit;
    /* Get selector that corresponds to the screen buffer */
    if (DosMapRealSeg(VID_BUF,VID_SIZE,&video_buffer) != 0)
       {
       printf("Unable to map screen segment\n");
       exit(255);
       }
    printf("Selector for video buffer %04X\n",video_buffer);
    if (DosGetSegLimit(video_buffer, &seglimit) == 0)
       /* Value returned should be 0x7fff in this example */
       printf("Screen segment limit : %08X\n",seglimit);
    }