how to prevent users able to perform cell actions except cell range selection

I am looking for code that makes it possible for the user to select a cell range as requested by InputBox commandbutton code to merge and populate these cell range, but prevents the user at any time to perform any modifications like deleting/changing values etc, unless by a code from another commandbutton that deletes the cell values.

So, it is like the cells are protected, but commandbutton code is able to perform any action.

Command buttons already in place and working, but I am looking for a block users can to perform actions manually, beyond these commands

Bart
2003

Protect the worksheets when the workbook opens using the userinterfaceonly:=true argument and then the code will be largely able to do what it wants whilst the user cannot. Note: you do have to do this each time the workbook opens.