Gets the length of a string in a list-box item
[C++]
int GetTextLen(
   int nIndex
) const;
Specifies the zero-based index of the item in the list box.
The length (in bytes) of the string, excluding the terminating null 
			character. If nIndex does not specify a valid index, the return value is 
			-1.
Gets the length of a string in a list-box item.
Header: xldialog.h