Can VB get the colour value of pixel in viewcam???(編號:1234)

各位人兄,
請問vb 有乜Command 能 get & change the colour value after the viewcam capture a image la????
( eg. VC 有 c = img.Getpixel(x,y) // get colour value
r = getrvalue(c)  // get red colour value
      g = getgvalie(c)  // get green colour value
      b = getbvalue(c)  // get blue colour value
      img.setpixel(i, rgb(r,g,b) //set colour value )
多謝各位小弟感激不盡....