how to check this values in a textbox?

[urboyfriend]

binary value in a textbox

hexadecimal value in a textbox

octal value in a textbox

decimal value in a textbox

it would display invalid input if none of those exist

[Zach_VB6]

Check out the following functions:

Hex
Oct

[Hack]

Rather than checking specific types, wouldn't it be easier to simply ensure the textbox would not accept alpha characters?

[Pradeep1210]

Ohhhhh.. sorry!!

I thought I was in the VB.NET forum.

[Pradeep1210]

Rather than checking specific types, wouldn't it be easier to simply ensure the textbox would not accept alpha characters?

Opting out alpha characters would be wrong.

e.g.
B1C24 is a valid Hexadecimal value, but contains alpha characters.

A better method is to create a function. In the function try to convert the value. If you get an error, that means it can not be converted, so return false. Otherwise return true.

Pradeep