I have been able to use Split before, w/ no problems. 
However, this time I am not so lucky.

I am trying to detect " " (spaces) in a string, splitting up the string into various words.  I can detect the position of the space using @In, I retrieve the correct value of the modified original string after the split, but the value from split (ie., the original string upto the first occurence of the space) is always 0.

For example: if I have vStr="mad cat sam" and vtemp=Split(vStr, " ")

these are the results:
@In(vStr," ") = 4
vtemp=0
vStr="cat sam"


any clues? TIA

yes it is.  (sorry i wasn't more specific)

I have a function in Global Code and I am calling it from a form. The code is as follows:

function format_string(str1 as string) as string

var vstr, fstr as String

fstr=""
vstr=""


while @Len(str1) > 0 and @In(str1," ") > 0
{      
     vstr=Split(temp," ")
     fstr=fstr+ " " + toupper(@Left(vstr,1)) +  tolower(@Right(vstr, @Len(vstr)-1))
      
   
} // end while
fstr=fstr+ " " + toupper(@Left(vstr,1)) + tolower(@Right(vstr, @Len(vstr)-1))
writeln("returning fstr as " + fstr)

return fstr
end function

When you declare multiple variables on the same line, you still have to specify a type for each.

Your line:
var vstr, fstr as String

... is resulting in vstr defaulting to type Int. Make it:
var vstr as String, fstr as String

Also, it looks like your code may result in an endless loop. You are splitting temp (which is undeclared), but you are checking str1 to see if you should continue running.

I also recommend that you return the result of your function to a variable, instead of setting the element value directly. This will give you a chance to make sure that the function succeeded before whacking the original value.

If you're interested, there is an example of making Initial Caps posted in the Programming Examples