Graphics.copyTo method
public bool copyTo(Graphics destGraphics, int destX, int destY, int width, int height, int srcX, int srcY, DWORD rop)
public bool copyTo(Graphics destGraphics, int destX, int destY, int width, int height, int srcX, int srcY)
public bool copyTo(Graphics destGraphics, int destX, int destY, int width, int height)
public bool copyTo(Graphics destGraphics, Rect bounds)
Describe Drawing-Graphics-copyTo here.