Showing messages
You can use these methods for showing messages: Show Message and Show Modal Message.
Show Message
This displays a non-blocking message to the user. This is a non-styled message for use as a convenience during development. Calling this client API will have the same effect as calling the ShowMessage() server-side API.
context.ShowMessage(message) 
		
context.ShowMessage(message, seconds): This auto
		  closes after the specified number of seconds. 
		
Show Modal Message
This displays a modal message to the user. This is a non-styled message for use as a convenience during development. Calling this client API will have the same effect as calling the ShowModalMessage() server-side API.
context.ShowModalMessage(message) 
		
context.ShowModalMessage(message, title)