Hi,
This is the help on the SetSplitBar method, which is what you need:
SetSplitBar Method
See AlsoApplies ToExampleSpecifics
Positions the vertical split bar in a sheet view to display the specified number of columns.
Syntax
expression .SetSplitBar(ShowColumns)
expression Optional. An expression that returns an Application object.
ShowColumns Required Long. A number from 1 through 75 that specifies the number of columns to display, including the locked ID column. The default behavior is to position the vertical split bar to the right of the field that is closest to being fully displayed.
Remarks
If the right pane of the view has been sized so that there is no left pane, the SetSplitBar method has no effect.
Greetings,