+#if TARGET_HOST_MS_WINDOWS
+/*
+ * Helper functions for getting client area from the window rect
+ * and the window rect from the client area given the style of the window
+ * (or a valid window pointer from which the style can be queried).
+ */
+void fghComputeWindowRectFromClientArea_UseStyle ( const DWORD windowStyle , RECT *clientRect, BOOL posIsOutside );
+void fghComputeWindowRectFromClientArea_QueryWindow( const SFG_Window *window, RECT *clientRect, BOOL posIsOutside );
+void fghComputeClientAreaFromWindowRect ( const SFG_Window *window, RECT *windowRect, BOOL wantPosOutside );
+RECT fghGetClientArea ( const SFG_Window *window, BOOL wantPosOutside );
+void fghGetBorderWidth(const DWORD windowStyle, int* xBorderWidth, int* yBorderWidth);
+#endif
+