Altera Quartus II Scripting - Manual (Page 307)

Chapter 3: Tcl Packages & Commands 3–177
misc
© July 2013 Altera Corporation Quartus II Scripting Reference Manual
init_tk
Usage
init_tk
Options
None
Description
Initializes a Tk window. If you are using Tk functionality in Tcl, you must run this command first before
running any Tcl scripts.
Example
# Initialize the Tk library
init_tk
# Create a top level and add a title
toplevel .top
wm title .top "Hello World"
# Add widgets
button .top.hello -text Hello -command {puts stdout "Hello, World!"}
pack .top.hello -padx 20 -pady 10
# Without "tkwait", the script finishes at this point and the
# window is destroyed. The "tkwait" command prevents the
# script from finishing until the you close the window.
tkwait window .top