formRun Class doubt

Hi,

As im new to AX Dynamics And im facing doubt in system and application class.

Can anybody tell whether formrun class is system class or application class.?
Can system class can be overidden??

system classes are are the documented classes which we can find under system documentation node

we can extend the system classes.

for eg; you can find some classes in the classes node with a different symbol, if we open them they were extended by the system classes .

Thankyou mahesh!![Y]

Hi mahesh,
Can u tell code of merge method in ax2012??