help with regex function for extract numbers out

I have the following regex pattern that is extracting a number string out as needed, with one exception.
Some of the string have a minus sign representing a negative number. the following pattern does not pick that up.

Pattern that is working: .Pattern = "(?:[01]?\d|2[0-3]):[0-5]\d"

I have tried using the -? before the ?:, but that does not work.

Thank you in advance for any suggestions.

Yes I can. Thank you for your response.
example:
-0:20 (27)
0:33 (6)

Desired results would be:
-0:20
0:33

The pattern above is getting 0:20 and not picking up the minus sign, not all numbers have a minus sign, the balance are all positive numbers.

That does the job, thank you