quickcam 4000 pro how to manipulate zoom from c++ code

Archived from groups: alt.comp.periphs.webcam (More info?)

hi,
does anybody knows if it's possible to manipulate the parameters of a
logitech quickcam 4000 pro directly from c++ code?

for example initialize the camera resolution to 320*240 or the zoom to
200% at the start of the application...

my application crash if the resolution has change by another one from
320*240 to 640*480 and it would be interesting to put two buttons for
the zoom in the main window and not have to open the control panel
everytime.

thanks

violink