Tried compiling and running this
http://msdn.microsoft.com/en-us/library/dd940324(VS.85).aspx
When the app runs two cursors are displayed on the screen, standard small Windows cursor and the magnified cursor as created by the parameter MS_SHOWMAGNIFIEDCURSOR in the CreateWindowEx call in the SetupMagnifier function.
The question is, how do I hide the standard(unmagnified) Windows cursor?