Why can't the following programs cannot be executed, how to implement? ? This

zhaozj2021-02-12  150

procedure TForm1.DBGrid1DblClick (Sender: TObject); varitem_xh: string; beginitem_xh: = DBGrid1.SelectedField.DataSet.FieldValues ​​[ 'item_xh']; item_xh: = item_xh '. htm'; showmessage (item_xh); shellexecute (0, 'Open ', item_xh,' ',' ', sw_show; end;

// Tips String and PansString types do not match, how should you do if this feature is to be implemented? ?

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