Hello everyone!
As a hobby, I create static wallpapers by overlaying green rectangle with anime characters.
One day, I came across an illustration of a pocket watch, so instead of overlaying it with a green rectangle, I implemented a watch movement using Processing to create a moving wallpaper.
Surprisingly, the code for the moving wallpaper turned out to be shorter than I expected.
import com.sun.jna.Native;
HWND workerW ;
[…]
void setup() {
fullScreen(1);
[...]
HWND progman = User32.INSTANCE.FindWindow ( “Progman”, null ) ;
HWND workerW = User32.INSTANCE.FindWindowEx ( progman, null, “workerW”,
HWND childDC = User32.INSTANCE.FindWindow ( null, “[sketch_name]” ) ;
HWND rtn_set = User32.INSTANCE.SetParent ( childDC, workerW ) ;
}
That’s all the code you need to add to sketch.
ex; Pocket watch
ex; Video playback
See you again sometime.
1 Like
glv
September 27, 2025, 9:04pm
2
Hello @FortranGuy ,
I added the sketch name and added latest JAR files but all I get is a gray screen:
jna-5.18.0.jar
jna-platform-5.18.0.jar
Note:
The 4.1.2 did not work here
Using W10, Processing 4.4.7
FortranGuy:
[…]
Is something missing in your code?
I am expecting a Windows background with icons on top but just seeing the background fullscreen.
:)
Hello @glv .
Thanks for trying!
In conclusion, this code is currently only for Windows 11.
Of course, when I tested this code, I ran it on Windows 10 and Windows 11.
I followed the steps in the original source and used MS spy++ to check the behavior of Windows 10 and Windows 11.
Based on the article ( Code Project ) I referenced, I used spy to observe step-by-step execution on Windows 10 and Windows 11.
Just to be sure, I used a MS spy++ to observe the OS’s standard slideshow, and as expected, it ran clearly differently on Windows 10 and Windows 11.
So I decided to say goodbye to Windows 10 and welcome Windows 11.
Sorry I couldn’t be of much help…
Hello @glv and everyone!
Supplement…
The code with the frame added is shown below:
import processing.awt.PSurfaceAWT;
import java.awt.Component;
import java.awt.Frame;
import com.sun.jna.Native;
import com.sun.jna.Structure;
import com.sun.jna.WString;
import com.sun.jna.Pointer;
import com.sun.jna.platform.win32.WinDef.HWND;
import com.sun.jna.platform.win32.WinDef.DWORDByReference;
import com.sun.jna.platform.win32.WinDef.WPARAM;
import com.sun.jna.platform.win32.WinDef.LPARAM;
import com.sun.jna.platform.win32.WinDef.HDC;
import com.sun.jna.platform.win32.* ;
import com.sun.jna.win32.StdCallLibrary;
HWND workerW ;
HWND childDC ;
HDC dc_workerW ;
HDC dc_childDC ;
void setup() {
fullScreen(SPAN);
PSurfaceAWT awtSurface = (PSurfaceAWT)surface;
PSurfaceAWT.SmoothCanvas smoothCanvas = (PSurfaceAWT.SmoothCanvas)awtSurface.getNative();
Frame frame = smoothCanvas.getFrame();
frame.removeNotify();
frame.setSize(width, height);
frame.setAlwaysOnTop(true);
frame.setUndecorated(true);
frame.setOpacity(0.995f);
frame.addNotify();
frame.setLocation ( 0, 0);
colorMode(RGB);
frameRate(20);
smooth();
noStroke();
textureMode(NORMAL);
hint(ENABLE_DEPTH_TEST);
HWND progman = User32.INSTANCE.FindWindow ( "Progman", null ) ;
DWORDByReference dbr = new DWORDByReference();
User32.INSTANCE.SendMessageTimeout ( progman, 0x052c, new WPARAM(0), new LPARAM(0), 0x0, 1000, dbr ) ;
HWND workerW = User32.INSTANCE.FindWindowEx ( progman, null, "workerW", null) ;
HDC dc_workerW = User32.INSTANCE.GetDC( workerW );
HWND childDC = User32.INSTANCE.FindWindow ( null, " sketch_name " ) ;
HDC dc_childDC = User32.INSTANCE.GetDC( childDC );
HWND rtn_set = User32.INSTANCE.SetParent ( childDC, workerW ) ;
}
1 Like
I have a new incident:
