Using files from Properties - .resx

Hi guys.

I really need your help. How to use files (image for example) from .resx file? I have testimage.jpg in Resource1.resx in Properties.

So How to use this file?

For example :

void PictureBox1MouseMove(object sender, MouseEventArgs e)
        {
    pictureBox1.Image = Testprogram. // How to choose Properties? Just I have only MainForm and Program
        }