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unable to setFocus in SWT fields in eclipse plugin..plz help

Nandan DP
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Hi i have created a Eclipse plug-in containing a form-fields based editor
(i.e, a custom editor for my xml made up of comboboxes & textfiedls).

The screen has few mandatory fields,
on save i check for mandatory fields and pop up appropritate error message,
After this i need to set the focus on appropritate field.

I have used .setFocus() method for setting focus on combo box, it returns false,
i debugged through the source code of swt, i found out the reason behind this, field.isEnabled() returns false ,hence not able to setFocus on it.

I tried field.setEnabled(true), also parent.setEnabled(true) before setting focus, nothing works,
any body who knows this solution,
please help me

2)Also keyboard shortcuts like Ctrl+C, Ctrl+V, does not work in these fields
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