test for mousewheel constants separatly

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@10064 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

diff --git a/src/msw/window.cpp b/src/msw/window.cpp
index 628d0b76ec9c48ef34b997cf8c119604f35cb442..67b1e4d3210d5c5402b809d32aee163411b4691a 100644 (file)
--- a/src/msw/window.cpp
+++ b/src/msw/window.cpp
@@ -111,7 +111,11 @@
 #if wxUSE_MOUSEWHEEL
     #ifndef WM_MOUSEWHEEL
         #define WM_MOUSEWHEEL           0x020A
+    #endif
+    #ifndef WHEEL_DELTA
         #define WHEEL_DELTA             120
+    #endif
+    #ifndef SPI_GETWHEELSCROLLLINES
         #define SPI_GETWHEELSCROLLLINES 104
     #endif
 #endif