Text Cursor location in a TextBox

[Peteroid]

I'm doing a managed C++.NET (2003) application where I use a
Control::TextBox. When typing in text there is a cursor indicating the
position of where typed in text will go next (typically, a blinking vetical
line-segment character). I need to either make this invisible or be able to
control and read its position. How can I do this?

Alternately, is there a way to force a TextBox to manage typing in a
fractional number on its own so that the number in the TextBox text field
is always a valid fractional number (i.e., numbers like 94.543)? Note that
this means being smart about decimal-points, leading zeros, only allowing
numeric and decimal point characters to be displayed, deal with backspace,
etc. I'm writing my own, and therefore need to control the 'text cursor'...

[==Peteroid==]