Thanks guys, I'm starting with:

Guru's Guide to SQL Server Architecture and Internals

pretty excited about it too: w00t:

I'm such a geek, I'm actually excited about getting a manual! Carpe Dium!

Are your myTextBox's being generated through code or are they on the page already? Is this a user control and is the skin seperate? Is this a class being imported? The problem you...

Thanks Frank. This is good to know. Where does @f1 get used?

set @m3 = @m1/(@m2*1.0)

is this it, to change the datatype in the calculation?

set @m3 = @m1/(@m2*@f1)

This solution is good for multiple parameters that may or may not be passed.

I haven't seen your Proc so here is a potentially similar one. This procedure set defaults to null...

Oh, yes. I have pulled some hair out over this one. SQL is giving you one thing, but the control is rendering another! This is a formatting problem.

Here:

<asp:TextBox

Here's a quick solution based on the info in your post, buddy. There is proly a less expensive way to do this, but here you go. Substitute the name of your table...