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public class ProgName extends MIDlet {
Abt AboutUsScreen;
public  ProgName ()
    {
    }
public void AbtSho()
    {
        display.setCurrent(AboutUsScreen);
    }

} 

public class RRCrd extends MIDlet  implements CommandListener, MessageListener
{
private ProgName midlet;
public Abt(ProgName midlet)
  {
      this.midlet = midlet;
  }
public void startApp()
  {
...
display = Display.getDisplay(this);
      display.setCurrent(form);
}

} 

public void AbtSho()
    {
        display.setCurrent([b]AboutUsScreen[/b]);
    } 

C:UsersSSDocumentsNetBeansProjectsProjectNamesrcProgName.java:85: cannot find symbol
symbol  : method setCurrent(Abt)
location: class javax.microedition.lcdui.Display
        display.setCurrent(AbtScreen);
1 error
C:UsersSSDocumentsNetBeansProjectsProjectNamenbprojectbuild-impl.xml:389: Compile failed; see the compiler error output for details.
BUILD FAILED (total time: 0 seconds)