PreviewField
PreviewField *pField = (PreviewField*)field;
return dynamic_cast<const PreviewField*>(field);
PreviewField::PreviewField(void)
PreviewField::~PreviewField(void)
class PreviewField : public BField
PreviewField(void);
virtual ~PreviewField(void);
class BitmapPreviewField : public PreviewField
class IntegerPreviewField : public PreviewField
class StringPreviewField : public PreviewField
PreviewField *preField = (PreviewField*)row->GetField(3);