I have a worksheet with existing data.

Look the attached picture
Data to textbox.jpg

When I open the UserForm, I want to list the existing data from the worksheet in the Textboxes and then be able to change the value, when clicking the button "Insert data".
If I only change a single of the data value, it should keep all the other existing data.

Look the attached picture
Textbox.jpg


Can anybody help me making a code:
1. List the existing data in the Textboxes, when the UserForm open.
2. Insert new data and keep the old I don't change, when clicking at the button "Insert data".

Thank you in advance.

Ib