SPos X Y
This command sets system variables $PosX and $PosY to value so that window
on WB position $PosX $PosY is always on the position X Y of the MONITOR
although the WBScreen is moved.

Usable for POP-UP shells. This example opens shell in top left corner of the
monitor.

SPos 0 0
NewShell CON:$PosX/$PosY/640/100/Shell

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
---------- ----------- ------- ------- ------ ---------- ------------ -------------
[generic]                   72      77  93.5% -lh5- fff2 Oct 26  1996 SPos/CenterShell
[generic]                  156     258  60.5% -lh5- cc46 Oct 26  1996 SPos/Install-SPos
[generic]                  291     637  45.7% -lh5- 7f93 Oct 26  1996 SPos/Install-SPos.info
[generic]                  321     368  87.2% -lh5- a6ea Oct 26  1996 SPos/SPos
[generic]                 1193    2743  43.5% -lh5- dfd9 Oct 26  1996 SPos/SPos.asm
[generic]                  866    1575  55.0% -lh5- f7d6 Oct 26  1996 SPos/SPos.doc
[generic]                  272     628  43.3% -lh5- 61f3 Oct 26  1996 SPos.info
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         7 files    3171    6286  50.4%            Oct 28  1996