Tab functionality through controls on an Inventor Add-in winform

[Tiffany_Hayden_]

I have a form that instantiated on a button click on custom ribbon for a custom add-in. I'm noticing some behavior that is odd and after a lot of research I think it's Inventor application causing this behavior. 

Controls 

3 text boxes, tab index is 1, 2, 3 where tabstop = True for all three. All other label controls have a greater than 3 tab index. 

Form 

KeyPreview Property = True

What occurs is when a tab happens after the form loads the windows chime sounds like it is not allowed. 

Has anyone had this situation where tab was not allowed on a windows form within a custom addin? If so what did you do? 

Thanks! 

[bradeneuropeArthur]

Do you use show or showdialog?

[Tiffany_Hayden_]

I'm currently using .show on my form.

[bradeneuropeArthur · Accepted solution]

Could you try showdialog, if that makes difference?

[Tiffany_Hayden_]

I definitely will try that!

[Tiffany_Hayden_]

@bradeneuropeArthur Changing it from show to showdialog worked! Thanks so much! 

[bradeneuropeArthur]

Sometimes the solution is closer than is thought.

Let me know if you have any other or programming related issues.

[Tiffany_Hayden_]

Yes I searched high and low! That's why I love the forums. So many people that have so much experience in one place. I'm so glad we have this community. 😊😊