FreezePanes Property
True if split panes are frozen. Read/write Boolean.
Remarks
It’s possible for FreezePanes to be True and Split to be False, or vice versa.
This property applies only to worksheets and macro sheets.
Example
This example freezes split panes in the active window in Book1.xls.
Workbooks("BOOK1.XLS").Worksheets("Sheet1").Activate
ActiveWindow.FreezePanes = True