TCL, TK

• By default, the TK 8.4 doesn't support 
• TTK (::ttk::), and so the package "tile" is required to support TTK.
• install "teacup install tile"
• code "package require tile"
• Picture format of JPEG & PNG, and so the package "img" is required to support JPEG & PNG.
• install "teacup install Img"
• code "package require img::jpeg"
• code "package require img::png"

• frame style
• flat, groove, raised, ridge, solid, sunken
• 
  
• font type
• time, verdana
• 
  
• Packing option [pack]
• -after win  ==> Packs after win in the packing order.
• -anchor anchor ==> Anchors: center, n, ne, e, se, s, sw, w, or nw.
• -before win ==> Packs before win in the packing order.
• -expand boolean ==> Controls expansion into the unclaimed packing cavity.
• -fill style ==> Controls fill of packing space. Style: x, y, both, or none.
• -in win ==> Packs inside win.
• -ipadx amount ==> Horizontal internal padding, in screen units.
• -ipady amount ==> Vertical internal padding, in screen inits.
• -padx amount ==> Horizontal external padding, in screen units.
• May be a list of two screen units for asymmetric padding (Tk 8.4).
• -pady amount ==> Vertical external padding, in screen units.
• May be a list of two screen units for asymmetric padding (Tk 8.4).
• -side side ==> Sides: top, right, bottom, or left. 

• Entry
• -show ==> Password
• set ::txt "thisIsPW"
• ::ttk::entry .txt -textvariable ::txt -show "*"
• pack .txt
•