David, I just downloaded some version of VideoCap, Property pages shows me the OleClass = VIDEOCAP.VideoCapCtrl.1
This control comes with VFP examples. Here how I make it to get a JPG (based on their examples of cource):

strFileName="C:\Test.Jpg"
result                  = thisform.VideoCap1.SnapShotJPEG(strFileName,100)
** The second parameter is numeric. WIth it you can adjust JPG quality
thisform.image1.picture = strFileName

I can pots whole code here if you want