Windows 7: How to make pc audio play through headset

I just bought a turtle beach x11 headset and when I plug it in all PC sounds play through the headset as they are suppose to. But when I open a external program such as mumble or ventrillio any voice over ip all sound stop playing in my headset and starts playing out of my pc. Is there anyway I can make it so all pc sounds come through my headset instead of my laptop when I open a voip. Also for some reason i cant use th mic on my headset all games and voip programs automatically use my intergrated laptop mic.

Change the settings in your VoIP applications so they know to use the headset, they don't normally re-route the mic/speakers in VoIP apps in order to make you not go crazy.

I tryed I set it to microphone but nothing happened