Strictly-typed VI refnums have data type information that includes the connector pane of the VI. You can use strictly-typed VI refnums to call a dynamically loaded VI using the Call By Reference function.
Complete the following steps to create a strictly-typed VI refnum.
Right-click a VI refnum control and select Select VI Server Class»Browse from the shortcut menu to select a VI from disk that has the connector pane you want.
Right-click the refnum control and select Select VI Server Class»Strictly Typed VIs and select the connector pane.
You also can drag a VI icon, connector pane, or a subVI icon from a block diagram or the Hierarchy window to a VI refnum control to specify the type of a strictly-typed VI refnum control.