diff --git a/src/msw/toplevel.cpp b/src/msw/toplevel.cpp
index e978a597fb..6874f1327d 100644
--- a/src/msw/toplevel.cpp
+++ b/src/msw/toplevel.cpp
@@ -172,6 +172,8 @@ WXDWORD wxTopLevelWindowMSW::MSWGetStyle(long style, WXDWORD *exflags) const
         msflags |= WS_THICKFRAME;
 #endif
     }
+    else if ( exflags && ((style & wxBORDER_DOUBLE) || (style & wxBORDER_RAISED)) )
+        *exflags |= WS_EX_DLGMODALFRAME;
     else if ( !(style & wxBORDER_NONE) )
         msflags |= WS_BORDER;
 #ifndef __WXWINCE__
@@ -213,7 +215,7 @@ WXDWORD wxTopLevelWindowMSW::MSWGetStyle(long style, WXDWORD *exflags) const
 
     if ( exflags )
     {
-#if !defined(__WIN16__) 
+#if !defined(__WIN16__)
         if ( !(GetExtraStyle() & wxTOPLEVEL_EX_DIALOG) )
         {
             if ( style & wxFRAME_TOOL_WINDOW )