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 twSize( Direction, sNumber, SaveORide )
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     This function allows the user to change the size of the current
     window. Since text in the window is preserved, and in order to get
     a working model of this routine up and running, twSize() will not
     allow sizing over the size of the original window, unless saved
     again with the SaveORide parameter. The operation of twSize() will
     be enhanced with the next release of TSDWIN.

     Right now, all sizing operations are done at the bottom window row
     and the right window column.

     IF THE WINDOW CARRIES SHADOW INFORMATION, IT IS UPDATED AS THE
     WINDOW SLIDES.

       Arguments:

     Direction - 'C' "V or H" for Vertical or Horizontal.  If you do
                     not specify a direction, the function does
                     nothing.

     sNumber   - 'N' the number is spaces to decrease or increase the
                     size by. Negative number mean decrease.

     SaveORide - 'L' If you want to use what is on the stack already,
                     leave this alone. It defaults to .F. If you make
                     it .T. it will overwrite the contents of the
                     WSAVED area of the stack with the screen display
                     in the Current Window Display Area, EVEN IF IT IS
                     SMALLER THAN WHAT WAS ORIGINALLY CREATED!

       Return:

     Current Window Handle.

       Example:

     twSize( "V", -3 )

     Decreases the vertical size by bringing the bottom row up three
     lines.

     If you want to allow user sizing on the fly, try creating a
     function to be called on a SET KEY. See the WINDEMO.PRG source
     code for details.