To set a subform's column (in datasheet view) to hidden:
From the parent form:
Code:
Me.SubformControlNameHere.Form.ControlNameHere.ColumnHidden = True
Where SubformControlNameHere is the name of the subform control (control on the parent form which houses the subform) and not the name of the subform itself, unless they are exactly the same name.
From the subform itself the code is:
Code:
Me.ControlNameHere.ColumnHidden = True
See this reference for what you can do with datasheets:
http://msdn.microsoft.com/en-us/libr...ffice.11).aspx