-// Comment this out if you don't mind slower compilation of the wxWindows
-// library
-#if !defined(__WXMAC__) && !defined(__SALFORDC__)
-#include <windows.h>
-#endif
+// check if to use precompiled headers: do it for most Windows compilers unless
+// explicitly disabled by defining NOPCH
+#if defined(__VISUALC__) || \
+ defined(__DMC__) || \
+ defined(__VISAGECPP__) || \
+ defined(__MWERKS__) || \
+ defined(__WATCOMC__) || \
+ defined(__BORLANDC__)