When trying to uncheck a checkbox with the following simple line of
code
CheckBox8.Checked = False
I get the following error
StartIndex Cannot Be less tha Zero
Parameter name: StartIndex
Its a windows application. When the form loads, some of the checkboxes
get checked based on a user selected. When another user is selected
some checkboxes get checked the checked states get checked.
Any help really appreciated.

(E-Mail Removed) wrote:
> When trying to uncheck a checkbox with the following simple line of
> code
> CheckBox8.Checked = False
> I get the following error
> StartIndex Cannot Be less tha Zero
> Parameter name: StartIndex

Then your "simple line of code" is causing lots of other, complicated
lines of code to be run and one of /those/ is failing.

Pop a few breakpoints in the code that runs when a Checkbox is
checked/unchecked.

HTH,
Phill W.

On Feb 23, 5:04 pm, "Phill W." <p-.-a-.-w-a-r...@-o-p-e-n-.-a-c-.-u-k>
wrote:
> ash...@gmail.com wrote:
> > When trying to uncheck a checkbox with the following simple line of
> > code
> > CheckBox8.Checked = False
> > I get the following error
> > StartIndex Cannot Be less tha Zero
> > Parameter name: StartIndex
>
> Then your "simple line of code" is causing lots of other, complicated
> lines of code to be run and one of /those/ is failing.
>
> Pop a few breakpoints in the code that runs when a Checkbox is
> checked/unchecked.
>
> HTH,
> Phill W.

Thanks. The Checkbox_CheckChanged Event was causing the error by
trying to remove a character in a string at position "-1".
Thanks Again
Ammar