i have dll and command name which is calling on button.
I want to enable button at zero document state. for that i am using AvailabilityClassName
when i give name in AvailabilityClassName. .while running it shows error as class has not inherit the IexternalCommandAvailability.
I know it is require to implement Iexternal Availavbility in that class.
But i have only dll and command. class is not available with me.How can implement
AvailabilityClassName property?