Reputation: 47
I am using jna.extra.User32Extra library and I have to change windowdisplayaffinity value. Unfortunately the output is always false, I don't know why, and this code doesn't work. I expect WDA_MONITOR makes windows black when print screen
public class Browser extends Application {
@Override
public void start(Stage stage) throws Exception {
StackPane pane = new StackPane();
WebView view = new WebView();
WebEngine engine = view.getEngine();
engine.load("https://google.com");
pane.getChildren().add(view);
Scene scene = new Scene(pane, 1280, 720);
stage.setTitle("Browser JAVA");
stage.setScene(scene);
WinDef.HWND hWnd = User32.INSTANCE.FindWindow(null, "");
boolean output = User32Extra.INSTANCE.SetWindowDisplayAffinity(hWnd, 1);
System.out.println("output "+output);//false
stage.show();
}
public static void main(String[] args) throws IOException {
Application.launch(args);
}
}
Upvotes: 2
Views: 510
Reputation: 1343
Maybe your window isn't a top window, as the documentation suggests:
it returns FALSE when, for example, the function call is made on a non top-level window. https://learn.microsoft.com/en-us/windows/desktop/api/winuser/nf-winuser-setwindowdisplayaffinity
You should do as the doc says:
To get extended error information, call GetLastError.
Upvotes: 2