2. Does *strOffset go beyond (>string's len)? then, set to a valid value;<br/>

3. If *curPosition > fieldLength? or > strlen? or *curpostion > strlen-*stroffset,if it is, then reset it to an appropriate value.<br/>

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I saw your code, I think there might be not correct in line 9. 'maxStrLength' is not Length of *Str (len of "abc\0" is 4, but the size of str may be 10. when display the *str, the cursor will stay on the wrong position. --hqiao3