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JNA Java struct from pointer
public class DISPLAY_DEVICE extends Structure {
        public char DeviceName[] = new char[32];
        public int StateFlags;
    }

DISPLAY_DEVICE displayDevice = new DISPLAY_DEVICE();
    int i = 0;
    while((CLibrary.INSTANCE.EnumDisplayDevicesA(Pointer.NULL, i, displayDevice.getPointer(), 0))) {
        System.out.println("screen" + i);
        displayDevice.read();
        System.out.println(displayDevice.StateFlags);
        System.out.println(displayDevice.DeviceName);

public class MyStruct extends Structure {
   public char[] DeviceName = new char[32];
   public char StateFlags;
   public byte[] dontcare = new char[128];
}