Add alpha blending support to surfaces
diff --git a/vncviewer/CMakeLists.txt b/vncviewer/CMakeLists.txt
index d6a1b58..1833e70 100644
--- a/vncviewer/CMakeLists.txt
+++ b/vncviewer/CMakeLists.txt
@@ -48,6 +48,10 @@
 
 target_link_libraries(vncviewer rfb network rdr os ${FLTK_LIBRARIES} ${GETTEXT_LIBRARIES})
 
+if(WIN32)
+  target_link_libraries(vncviewer msimg32)
+endif()
+
 if(APPLE)
   target_link_libraries(vncviewer "-framework Cocoa" "-framework Carbon")
 endif()