I don't think you can use any of LabVIEW's controls directly in VB but you can call LabVIEW app's from VB
via ActiveX:
http://digital.ni.com/public.nsf/3efedde4322fef19862567740067f3cc/862567530005f09e86256843004469c8?OpenDocument
In LabVIEW, you could make a small simple VI that has just a chart on the front panel. Compile the VI into an EXE and enable ActiveX server. Then, in VB, you can call the LV ActiveX server and pass it data to plot on the chart.