function ActiveCanvas()

Returns the canvas that drawing commands are currently applied to

c1 = OpenCanvas(640, 480, 0, 0, 640, 480, 0) 
c2 = OpenCanvas(640, 480, 0, 0, 640, 480, 0) 
  
Canvas(c1) 
  
If ActiveCanvas() = c1 Then 
Print "Active canvas is c1" 
End If 
  
Canvas(c2) 
  
If ActiveCanvas() = c2 Then 
Print "Active canvas is now c2" 
End If