Window Handle getHWND() for jdk 5.0

Question

Does the following getHWND() method works for jdk 5.0?
public int getHWND () {
     DrawingSurfaceInfo drawingSurfaceInfo;
     Win32DrawingSurface win32DrawingSurface;
     int hwnd = 0;
     drawingSurfaceInfo = ((DrawingSurface)(getPeer())).getDrawingSurfaceInfo();
     if (null != drawingSurfaceInfo) {
          drawingSurfaceInfo.lock();
          win32DrawingSurface = (Win32DrawingSurface)drawingSurfaceInfo.getSurface();
          hwnd = win32DrawingSurface.getHWnd();
          drawingSurfaceInfo.unlock();
     return  hwnd;
}Thanks in advance.
sg
New Jersey

Answer 1

Hi Jim,
I tried to get HWND by referring from http://java.sun.com/j2se/1.3/docs/guide/awt/AWT_Native_Interface.html
The only difference i made is that I'm passing container instead of canvas to get HWND.
I declared native method in java as:
public native int getHWND(Container window);I got " Null drawing surface" for that from the follwing code line of my VC++ source code.
JNIEXPORT jint JNICALL Java_com_AccesControls_getHWND
  (JNIEnv *env, jobject, jobject window)
/* Get the drawing surface */
    ds = awt.GetDrawingSurface(env, window);
    if (ds == NULL) {
        printf("NULL drawing surface\n");
        return;
}Do you have any idea why awt.GetDrawingSurface(env, window) returns null?
I would be appereciate your any suggestion regarding this topic.
Kirti
Message was edited by:
Kirti_Mistry