"Sankalp" <sankalppa***@gmail.com> wrote in message
news:1164854581.728896.3850@14g2000cws.googlegroups.com...
> Hi I am writing a large program where I am using three text boxes. I am
> performing validation controls on these text boxes however there are
> some conditions
>
> Names of textboxes
> 1. x
> 2. y
> 3. z
>
> The conditions are
>
> 1. x , y , z should be numeric.
> 2. x and y can be blank ( x = "" , y = "") at a time
> 3. z can never be blank, it should always have a numeric value.
> 4. if x has a value y cannot be blank and x should be non negative
> 5. if y has a value x cannot be blank and y should not be non negative.
> 6. if x and y have values y > x
> 7.             z should be non negative
>
>
> A message box should pop up each time the user clicks a button with the
> appropriate error ( eg : x cannot be negative , or y cannot be greater
> than x , etc... )
>
> Since I am actually dealing with cells in a data grid I cannot use any
> sort of validation controls. I need to perform the validation using
> code. I am using visual studio 2005 , Visual Basic
> Any sort of help will be gratefully appreciated.
>