diff --git a/src/msw/toplevel.cpp b/src/msw/toplevel.cpp
index 4231b22c5d..8cd1e2d90a 100644
--- a/src/msw/toplevel.cpp
+++ b/src/msw/toplevel.cpp
@@ -323,10 +323,12 @@ bool wxTopLevelWindowMSW::CreateDialog(const void *dlgTemplate,
     if ( exflags )
     {
         ::SetWindowLong(GetHwnd(), GWL_EXSTYLE, exflags);
-        ::SetWindowPos(GetHwnd(), NULL, 0, 0, 0, 0,
+        ::SetWindowPos(GetHwnd(),
+                       exflags & WS_EX_TOPMOST ? HWND_TOPMOST : 0,
+                       0, 0, 0, 0,
                        SWP_NOSIZE |
                        SWP_NOMOVE |
-                       SWP_NOZORDER |
+                       (exflags & WS_EX_TOPMOST ? 0 : SWP_NOZORDER) |
                        SWP_NOACTIVATE);
     }