Fix wxRichToolTip compilation under MSW without PCH and recent SDK headers.

Include the headers normally included from wx/wxprec.h.

Also define the stuff missing from the headers of some compilers (notably
MinGW but probably also VC6) ourselves.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@69488 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/msw/richtooltip.cpp

@@ -26,6 +26,7 @@
 #if wxUSE_RICHTOOLTIP
 
 #ifndef WX_PRECOMP
+    #include "wx/treectrl.h"
 #endif // WX_PRECOMP
 
 #include "wx/private/richtooltip.h"
@@ -33,6 +34,32 @@
 #include "wx/msw/private.h"
 #include "wx/msw/uxtheme.h"
 
+// Provide definitions missing from some compilers SDK headers.
+
+#ifndef TTI_NONE
+enum
+{
+    TTI_NONE,
+    TTI_INFO,
+    TTI_WARNING,
+    TTI_ERROR
+};
+#endif // !defined(TTI_XXX)
+
+#ifndef Edit_ShowBalloonTip
+struct EDITBALLOONTIP
+{
+    DWORD cbStruct;
+    LPCWSTR pszTitle;
+    LPCWSTR pszText;
+    int ttiIcon;
+};
+
+#define Edit_ShowBalloonTip(hwnd, pebt) \
+    (BOOL)::SendMessage((hwnd), 0x1503 /* EM_SHOWBALLOONTIP */, 0, (LPARAM)(pebt))
+
+#endif // !defined(Edit_ShowBalloonTip)
+
 // ============================================================================
 // wxRichToolTipMSWImpl: the real implementation.
 // ============================================================================