Deletes a string from a list box
[C++]
int DeleteString(
   int nIndex
);
Specifies the zero-based index of the string to be deleted.
A count of the strings remaining in the list. The return value is -1 
			if nIndex specifies an index greater than the number of items in the 
			list.
Deletes an item in a list box.
Header: xldialog.h