added a note about SetBlinkTime under MSW

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7616 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/caret.tex

@@ -118,6 +118,12 @@ Move the caret to given position (in logical coordinates).
 
 Sets the blink time for all the carets.
 
+\wxheading{Remarks}
+
+Under Windows, this function will change the blink time for {\bf all} carets
+permanently (until the next time it is called), even for the carets in other
+applications.
+
 \wxheading{See also}
 
 \helpref{GetBlinkTime}{wxcaretgetblinktime}