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WDialog:SetFocus() Method
Recommend a position for the input focus
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Syntax
<oWnd>:SetFocus( [ <oCtrl> ] )   -->   x

Arguments
<oCtrl> optionally specifies the control to receive the input
focus next (default: chosen by the dialog).

Returns
The return value is not used.

Description
This method usually gives the input focus to the specified
control, but you should be aware that something may interfere:
another control may claim the focus, the control specified may
refuse it, the user may intervene, etc.

Example