include: Add GdipSetStringFormatFlags prototype.
diff --git a/include/gdiplusflat.h b/include/gdiplusflat.h
index 1a39dee..cb53ea4 100644
--- a/include/gdiplusflat.h
+++ b/include/gdiplusflat.h
@@ -561,6 +561,7 @@
GpStringFormat*, INT, GDIPCONST CharacterRange*);
GpStatus WINGDIPAPI GdipSetStringFormatTabStops(GpStringFormat*,REAL,INT,GDIPCONST REAL*);
GpStatus WINGDIPAPI GdipSetStringFormatTrimming(GpStringFormat*,StringTrimming);
+GpStatus WINGDIPAPI GdipSetStringFormatFlags(GpStringFormat*, INT);
GpStatus WINGDIPAPI GdipStringFormatGetGenericDefault(GpStringFormat **);
GpStatus WINGDIPAPI GdipStringFormatGetGenericTypographic(GpStringFormat **);