Do not understand your "combo jack" reference.
Usually a basic simple microphone just plugs into a 1/8" (3.5mm) female port on the motherboard, the sound card, or a speaker/speaker control box.
The color pink is normally used to indicate a microphone port.
And you have to or may have to go into audio controls and select the microphone for use.
If that does not answer your question please explain more about what you are attempting to do. Add details. Thanks.