I can't think of any way to do it. It's not really Tcl's fault. Those "window decorations" are added by the window manager (part of the operating system for Windows, a separate application like mwm on Unix), and are completely under its control. Microsoft has decided that it is a Good Idea not to turn off those three icons, and so we don't have an easy way for you to do so in Tcl.
About the only way to "turn off" those three icons would be to tell the window manager you didn't want it to manage that toplevel window. The command to do so (assuming the window's name is .d) is:
[tt]wm overrideredirect .d 1[/tt]
But when you do this, you don't get
any titlebar. You don't even get a border or resize handles, so there's no easy way to even allow the user to move the window around. "Overrideredirect" windows are typically used only for start-up splash pages and other special-purpose windows designed for limited interaction with the user. - Ken Jones, President
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