Fix WM_DESTROY message handling (#12648)

* Fix WM_DESTROY message handling

* modified condition

Author: Sachin-NI

src/System.Windows.Forms/src/System/Windows/Forms/AxHost.cs

@@ -3370,14 +3370,14 @@ protected override unsafe void WndProc(ref Message m)
 
     private unsafe void DetachAndForward(ref Message m)
     {
-        bool isHandleCreated = IsHandleCreated;
+        HWND handle = GetHandleNoCreate();
         DetachWindow();
-        if (isHandleCreated)
+        if (!handle.IsNull)
         {
-            void* wndProc = (void*)PInvoke.GetWindowLong(this, WINDOW_LONG_PTR_INDEX.GWL_WNDPROC);
+            void* wndProc = (void*)PInvoke.GetWindowLong(handle, WINDOW_LONG_PTR_INDEX.GWL_WNDPROC);
             m.ResultInternal = PInvoke.CallWindowProc(
                 (delegate* unmanaged[Stdcall]<HWND, uint, WPARAM, LPARAM, LRESULT>)wndProc,
-                HWND,
+                handle,
                 (uint)m.Msg,
                 m.WParamInternal,
                 m.LParamInternal);