3 files changed, 38 insertions, 0 deletions
diff --git a/src/nativewindow/classes/jogamp/nativewindow/windows/GDIUtil.java b/src/nativewindow/classes/jogamp/nativewindow/windows/GDIUtil.java
index 2f4e18359..acb4c84da 100644
--- a/src/nativewindow/classes/jogamp/nativewindow/windows/GDIUtil.java
+++ b/src/nativewindow/classes/jogamp/nativewindow/windows/GDIUtil.java
@@ -112,12 +112,22 @@ public class GDIUtil implements ToolkitProperties {
         return (Point) GetRelativeLocation0(src_win, dest_win, src_x, src_y);
     }
     
+    public static boolean IsUndecorated(long win) {
+        return IsUndecorated0(win);
+    }
+    
+    public static boolean IsChild(long win) {
+        return IsChild0(win);
+    }
+    
     public static native boolean CreateWindowClass(long hInstance, String clazzName, long wndProc);
     public static native boolean DestroyWindowClass(long hInstance, String className);
     
     private static native boolean initIDs0();
     private static native long getDummyWndProc0();  
     private static native Object GetRelativeLocation0(long src_win, long dest_win, int src_x, int src_y);
+    private static native boolean IsChild0(long win);
+    private static native boolean IsUndecorated0(long win);
   
     static native long CreateDummyWindow0(long hInstance, String className, String windowName, int x, int y, int width, int height);  
 }
diff --git a/src/nativewindow/native/win32/GDImisc.c b/src/nativewindow/native/win32/GDImisc.c
index 3ab7f9859..23be47380 100644
--- a/src/nativewindow/native/win32/GDImisc.c
+++ b/src/nativewindow/native/win32/GDImisc.c
@@ -224,3 +224,29 @@ JNIEXPORT jobject JNICALL Java_jogamp_nativewindow_windows_GDIUtil_GetRelativeLo
     return (*env)->NewObject(env, pointClz, pointCstr, (jint)dest.x, (jint)dest.y);
 }
 
+/*
+ * Class:     jogamp_nativewindow_windows_GDIUtil
+ * Method:    IsChild0
+ */
+JNIEXPORT jboolean JNICALL Java_jogamp_nativewindow_windows_GDIUtil_IsChild0
+  (JNIEnv *env, jclass unused, jlong jwin)
+{
+    HWND hwnd = (HWND) (intptr_t) jwin;
+    LONG style = GetWindowLong(hwnd, GWL_STYLE);
+    BOOL bIsChild = 0 != (style & WS_CHILD) ;
+    return bIsChild ? JNI_TRUE : JNI_FALSE;
+}
+
+/*
+ * Class:     jogamp_nativewindow_windows_GDIUtil
+ * Method:    IsUndecorated0
+ */
+JNIEXPORT jboolean JNICALL Java_jogamp_nativewindow_windows_GDIUtil_IsUndecorated0
+  (JNIEnv *env, jclass unused, jlong jwin)
+{
+    HWND hwnd = (HWND) (intptr_t) jwin;
+    LONG style = GetWindowLong(hwnd, GWL_STYLE);
+    BOOL bIsUndecorated = 0 != (style & (WS_CHILD|WS_POPUP)) ;
+    return bIsUndecorated ? JNI_TRUE : JNI_FALSE;
+}
+
diff --git a/src/nativewindow/native/win32/WindowsDWM.h b/src/nativewindow/native/win32/WindowsDWM.h
index 36f82fc94..6e5160fa4 100644
--- a/src/nativewindow/native/win32/WindowsDWM.h
+++ b/src/nativewindow/native/win32/WindowsDWM.h
@@ -4,6 +4,8 @@
     #include <windows.h> 
 
     #define DWM_BB_ENABLE                 0x00000001  // fEnable has been specified  
+    #define DWM_BB_BLURREGION             0x00000002
+    #define DWM_BB_TRANSITIONONMAXIMIZED  0x00000004
     #define DWM_EC_DISABLECOMPOSITION     0
     #define DWM_EC_ENABLECOMPOSITION      1