hi there I'm using Visual Studio 2005(visual Basic)
I'll tell you  some codes

sqrt of number

Code:

math.sqrt("number")

we can insert one textbox with name txtnum
and in code to write this

Code:

dim n as integer
n = val(txtnum.text)
msgbox(math.sqrt(n))

Adding number
insert to textboxes 1.txtnum1 , 2. txtnum2

Code:

dim a,b as integer
a = val(txtnum1.text)
b = val(txtnum2.text)
msgbox(a+b)

Subtracting Numbers
insert to textboxes 1.txtnum1 , 2. txtnum2

Code:

dim a,b as integer
a = val(txtnum1.text)
b = val(txtnum2.text)
msgbox(a-b)

Subtracting Numbers
insert to textboxes 1.txtnum1 , 2. txtnum2

Code:

dim a,b as integer
a = val(txtnum1.text)
b = val(txtnum2.text)
msgbox(a-b)

Multiplying Numbers
insert to textboxes 1.txtnum1 , 2. txtnum2

Code:

dim a,b as integer
a = val(txtnum1.text)
b = val(txtnum2.text)
msgbox(a*b)

Dividing Numbers
insert to textboxes 1.txtnum1 , 2. txtnum2

Code:

dim a,b as integer
a = val(txtnum1.text)
b = val(txtnum2.text)
msgbox(a/b)

Squaring Numbers
insert to textboxes 1.txtnum1 , 2. txtnum2

Code:

dim a,b as integer
a = val(txtnum1.text)
b = val(txtnum2.text)
msgbox(a^b)

have a nice day