[GRASS5] embedding GRASS display into my app

[David Piasecki]

After I have a PNG file I'm working with, how do I pass GRASS commands 
for pan/zoom? I tried setting g.region to the vector file I've been 
using, but it complained that the vector file didn't exist. Of course, 
within GRASS this works fine. It also seems to work from my terminal 
window. However, it doesn't work from my application when I do a 
system("g.region...");

Perhaps there is a PATH that's not correctly set?

David