Convert number-ranges to sequence of numbers (e.g. 142-145 to 142, 143, 144, 145)

Thank you very much macropod!
I am able to copy this (at least to me) impressive piece of code into a VBAProject and I can run it, but thats it. I am very sorry to say, but I am just not skilled enough to use this code-"module". I do not know how to send such a string to this code-"module" nor do I know how to save the output.
If you could implement your code into my example above ("example.xlsx"), that would be great. Then, I think, I could do the rest by myself.
TIA!

Edit: I may be wrong, but it does not seem to work with strings like "12ff" or "12f".