TeXnicCenter produces a status file named *.tps which holds information on currently open *.tex files and window positions. This most likely should not be checked in.
@@ -259,6 +259,9 @@ TSWLatexianTemp*
# KBibTeX
*~[0-9]*
+# TeXnicCenter
+*.tps
+
# auto folder when using emacs and auctex
./auto/*
*.el