Index: /trunk/src/VBox/Main/MouseImpl.cpp
===================================================================
--- /trunk/src/VBox/Main/MouseImpl.cpp	(revision 27402)
+++ /trunk/src/VBox/Main/MouseImpl.cpp	(revision 27403)
@@ -389,5 +389,6 @@
 
 /**
- * Convert an X value in screen co-ordinates to a value from 0 to 0xffff
+ * Convert an X value in screen co-ordinates (starting from 1) to a value
+ * from 0 to 0xffff.
  *
  * @returns   COM status value
@@ -408,5 +409,6 @@
 
 /**
- * Convert a Y value in screen co-ordinates to a value from 0 to 0xffff
+ * Convert a Y value in screen co-ordinates (starting from 1) to a value
+ * from 0 to 0xffff.
  *
  * @returns   COM status value
@@ -432,6 +434,6 @@
  *
  * @returns COM status code
- * @param x          X position (pixel)
- * @param y          Y position (pixel)
+ * @param x          X position (pixel), starting from 1
+ * @param y          Y position (pixel), starting from 1
  * @param dz         Z movement
  * @param buttonState The mouse button state