Well a form has a BufferMode property that you can set to whatever default buffering you want. ThisForm.BufferMode = 5. But this will not apply to tables of views that are already open. It will only apply to the tables and views opened by that form's DE. Also keep in mind that views can only have optimistic buffering.

>How do I programmatically set the default buffering mode for a table in a Data Session? I am talking about buffering modes 1:Off, 2:Record (Pessimistic), 3:Record (Optimistic), 4:Table (Pessimistic), or 5:Table (Optimistic). I can do it visually in the VFP development environment.
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>When I am in the VFP 6.0 SP3 development environment, I go to the menu item Tools, choose Options..., switch to the Data tab, and in the Locking and Buffering section, change Buffering to one of the following: Off, Record (Pessimistic), Record (Optimistic), Table (Pessimistic), or Table (Optimistic).
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>After making the Buffering change, any table that I open, using the Command window or the Data Session window, uses that buffering mode. Issuing a CursorGetProp('buffering') displays the current buffer mode (1 though 5).
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>If I create another Data Session, I can switch between the default DS and the new DS, and independently set the default buffering mode for each DS with the Tools:Options:Data:Buffering setting.
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>I know how to use CursorSetProp('buffering', 4) to change the value once the table is opened, but I can not figure out how to set the default buffering mode programmatically so the table opens in buffering mode 4, for example.