Fix changing wxWindow ID in wxMSW.

This must be done both at wxWidgets and MSW level, otherwise changing the ID
results in window not recognizing itself as the recipient of the messages sent
to it by Windows.

Closes #3697.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76672 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/window.cpp

@@ -552,6 +552,20 @@ bool wxWindowMSW::Create(wxWindow *parent,
     return true;
 }
 
+void wxWindowMSW::SetId(wxWindowID winid)
+{
+    wxWindowBase::SetId(winid);
+
+    // Also update the ID used at the Windows level to avoid nasty surprises
+    // when we can't find the control when handling messages for it after
+    // changing its ID because Windows still uses the old one.
+    if ( GetHwnd() )
+    {
+        if ( !::SetWindowLong(GetHwnd(), GWL_ID, winid) )
+            wxLogLastError(wxT("SetWindowLong(GWL_ID)"));
+    }
+}
+
 // ---------------------------------------------------------------------------
 // basic operations
 // ---------------------------------------------------------------------------