How to implement motion tween between two pionts

hi friends…

can anyone know abt creating motion tween with two inputs starting point and ending point of an object.

example:

**my object name: mcball
current point:(100,100);
desination point:(200,200);
**

here in AS3 whether any default methods are functions which take these two points and make motion tween.

if someone knows the code/syntax please help me…:jail: