I have an image control sitting on a picturebox. The picturebox contains the plot of a function y=f(x) and the image control has a small transparent picture representing the orientation of the axes, like this:

Name: xy.PNG Views: 419 Size: 577 Bytes

I sometimes drag it around if it is covering some relevant part of the graph and the problem then is it does flicker somewhat.

What would the best way be to avoid that flicker?