mouseX ad mouseY help

[Spark910]

If i had a 16x16Pixle image (1 Graal tile square) NPC that size too loacated at X=32 and Y=32 how would I make it so that if it was ANYWHERE on the NPC it would:

message test;

I want it to cover the whole NPC which I dont know how to do anyone know how to make it see if the mouse is ANYWHERE on the NPC thats 16x16pixles?

Thanks in advanced to those who may help, If i dont get a chance to thank you later.