For wxMSW, split XPM handler into separate file (please add handler explicitly in app);

doc changes espec. wxBitmap overview


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@1416 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/bitmap.h

@@ -129,11 +129,9 @@ public:
   // Initialize with raw data
   wxBitmap(const char bits[], int width, int height, int depth = 1);
 
-#if wxUSE_XPM_IN_MSW
-  class wxItem;
+  class WXDLLEXPORT wxItem;
   // Initialize with XPM data
   wxBitmap(char **data, wxItem *anItem = NULL);
-#endif
 
   // Load a file or resource
   wxBitmap(const wxString& name, long type = wxBITMAP_TYPE_BMP_RESOURCE);