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| Im having problems with the initial corrections with the offset and curpos. test 4.1 - when i have to correct curpos 40 to 19, program crashes. I know it has to do with the creating a local variable instead of pointing to external. <br/> here is my code that crashes the program: <br/> http://www.noobiedev.com/oop344/oop344-release-0-1-bug/ ||Create two local variables to store *strOffset & *curPosition,the purpose of doing this is:<br/>1. if IsTextEditor is true, test if *strOffset is changed, then teminate the program;(to do this, test everytime you press key that means test it in the loop)；<br/>2. when press the ESC key, if IsTextEditor is false, program revert to the original value(*strOffset & curPosition & *str);<br/>Before the loop, test this two variables (*strOffset & *curPosition) is vaild:<br/>1. Is *strOffset & *curPosition NULL? if it is , set to 0;<br/>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/>I hope these can help you to solve you problem.<br/>