Create a group box control. A group box control is a unique control compared with the other controls because all it does is group radio buttons (see RADIOBUTTONCREATE) and checkboxes (see CHECKBOXCREATE) both graphically and logically. Radio buttons and checkboxes must belong to a group box control.
parent input is the name of the window that owns the new group box control.
If no window or dialog with that name exists, then the FMSLogo screen window is used as the parent.
name input identifies the new group box control and must be a unique word.
xpos input is the X coordinate where the upper-left corner of the new group box control is placed.
ypos input is the Y coordinate where the upper-left corner of the new group box control is placed.
width input is the width of the new group box control.
height input is the height of the new group box control.
If the parent of the group box is the FMSLogo screen window, then the
height inputs are all given in turtle coordinates.
Otherwise, they are given in "dialog units", the origin is the upper-left corner of the parent, and Y values increase as you move down the screen.
TO CHECKONTHINGS IFELSE CHECKBOXGET "myhideturtle [HIDETURTLE] [SHOWTURTLE] END WINDOWCREATE "main "mywindow "mytitle 0 0 100 100  GROUPBOXCREATE "mywindow "mygroupbox 10 10 80 40 CHECKBOXCREATE "mywindow "mygroupbox "myhideturtle [Hide Turtle] 20 20 60 20 BUTTONCREATE "mywindow "mybutton "Go 40 50 25 25 [CHECKONTHINGS]
Clicking on the Go button shows or hides the turtle, depending on whether the checkbox is checked.
; Delete the window and all of its child controls. WINDOWDELETE "mywindow