I can sympathise Yvanne because when I was trying to wean Ky off the breast he was relentless and half the time it was easier to give in than stick to my guns. He'd try anything and everything to try and get some, icluding issesent whining - I imagine its like this with the dummy.
I mostly resorted to distraction...luckily he has a really short attention span and is distracted VERY easily....he forgets why he's crying half the time...the TV or something else will catch his attention mid cry and he forgets to carry on crying!
To this day though he will ask for milk (But he laughs when he askes now, like he knows the score but is gonna chance it anyway) In fact he asked me yesterday for milk when I was feeding the baby. He tried "Mommy milk - Last time?"...little monkey.