Gasman,
I've made indead a mistake. I posted my question in Excell help. I'am sorry I will do better in the future. Now I know the diffrence between UserForm and Form.
Your comment about looking for how to use debugging is off course a very good idea. I'm busy at the moment to read about debugging as well in books and internet.
I hope you understand I'am 66 y old, so it takes a bit longer to learn about debugging. And my dog ​​complains to my wife, that I have no time to play with her.

I already send my code to AussieBear en hopes he can come with good advice.

Greeting
TonC