*****How to access a repositoryItemButtonEdit value from a FileDlg

from:

http://www.devexpress.com/Support/Center/p/Q205500.aspx

I insert into my verticalGrid by programation a repositoryItemButtonEdit (as a row) that has of course a buttonEdit and a value, when the user click on the buttonEdit it make a fileDLG appears, I want to give back the path to the repositoryItemButtonEdit.OwnerValue and affect it to the tag's row.
To do this work, I subscibe to the event repositoryItemButtonEdit.ButtonClick in the Method OnClick a wrote the instruction fileDlg.ShowDialog() but I dont know how to access to the base row from here.

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Set the vGridControl.ActiveEditor.EditValue property to the FileDialog's FileName property value.

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I've got a problem setting GridView cell value from RepositoryItemButtonEdit that shows my form as a dialog.
I did it like in two Examples:

[C#]
        private static void buttonEdit_ButtonClick(object sender, ButtonPressedEventArgs e)
        {
            using (OpenFileDialog dlg = new OpenFileDialog())
            {
                dlg.Filter = "Файлы шаблонов(*.dot)|*.dot";
                if (dlg.ShowDialog() == DialogResult.OK)
                    (sender as ButtonEdit).EditValue = new System.IO.FileInfo(dlg.FileName).FullName;
            }
        }

[C#]
private void buttonEdit1_ButtonPressed(object sender, ButtonPressedEventArgs e) {
    ButtonEdit editor = (ButtonEdit)sender;
    int buttonIndex = editor.Properties.Buttons.IndexOf(e.Button);
    if (buttonIndex == 0) {
      Form2 form = new Form2(editor.EditValue);
      if (form.ShowDialog(this) == DialogResult.OK)
        editor.EditValue = form.EditingValue;
    }
}

as for the first example I implemented it and it works and changes the cell value and text.
And here is the problem: when I use my own form as a dialog editor.EditValue doesn't affect the cell value:

[C#]
        private static void onButtonClick(object sender, ButtonPressedEventArgs e)
        {
            (sender as ButtonEdit).EditValue = "It still works";
            if (new myDialogForm().ShowDialog() == DialogResult.OK)
                        (sender as ButtonEdit).EditValue = "Now it affects nothing!!!";
            else
                return;
            (sender as ButtonEdit).EditValue = "And here as well =(";
        }

I partially solved the problem using:
[C#]
        (((sender as ButtonEdit).Parent as GridControl).FocusedView as GridView).SetFocusedValue("Now it works");

but I dont like it because it doesn't fire gridView's CellValueChanging event.