If anyone's tried to prevent the Web Browser control from opening IE when the user clicks a link which specifies a "new _blank target window", here's how. Note: I searched and didn't find any solution on this, so please excuse me if it's been pointed out and I missed it.

1) In your VFP form, add "two" web browser controls. Don't make the second one visible, as it will not be shown.

2) In the main (first) web browser control's NewWindow2 event, add this:

LPARAMETERS ppdisp, cancel
* use our hidden browser control in order to get the url
* note, can't get url from BeforeNavigate2
ppdisp= thisform.xoleweb2

3) in the second web browser control's NavigateComplete2 event, add this:

LPARAMETERS pdisp, url
* send url to first browser control. we compare to avoid recursive calls from popups
IF NOT thisform.xoleweb1.LocationUrl == this.locationUrl
	thisform.xoleweb1.Navigate2(this.locationURL)
ENDIF

4) in the second web browser control's NewWindow2 event, add this:

LPARAMETERS ppdisp, cancel
* avoid popups. this has same effect as cancel. note, cancel=.t. doesn't work
ppdisp= this

Hope this helps someone.
Aloha, -Mark