[code]#####
DestroyFunc FuncName
AddToFunc FuncName
+ I (Action to happen immediately)
+ C (Action to happen on a mouse 'click)
+ D (Action to happen on a mouse ‘double click’)
+ H (Action to happen on a mouse ‘hold’)
+ M (Action to happen on a mouse ‘motion’)
###########[/code]
It’s extracted from FVWM Beginners Guide.