+ ADD_DEFINITIONS(-D_WIN32_WINNT=0x0500)
+ ADD_DEFINITIONS(-DWINVER=0x0500)
+ ENDIF()
+
+ IF(NOT(MSVC_VERSION LESS "1600"))
+ # minimum requirement for WM_TOUCH device
+ ADD_DEFINITIONS(-D_WIN32_WINNT=0x0601)
+ ADD_DEFINITIONS(-DWINVER=0x0601)
+ ENDIF()