Implemented processing for actions SPI_SETMOUSEBUTTONSWAP,
SPI_SETFASTTASKSWITCH, SPI_SETDRAGFULLWINDOWS, SPI_SETWORKAREA.

diff --git a/include/sysmetrics.h b/include/sysmetrics.h
index 70df706..f39a05c 100644
--- a/include/sysmetrics.h
+++ b/include/sysmetrics.h
@@ -11,6 +11,7 @@
 extern INT SYSMETRICS_Set( INT index, INT value );  /* sysmetrics.c */
 extern void SYSCOLOR_Init(void);  /* syscolor.c */
 extern void SYSPARAMS_GetDoubleClickSize( INT *width, INT *height );
+extern INT SYSPARAMS_GetMouseButtonSwap( void );
 
 /* Wine extensions */
 #define SM_WINE_BPP (SM_CMETRICS+1)  /* screen bpp */