How uniqule Identify WebEdit in QTP

[QTP9.2]

Can you write one liner syntax ... as given in example.

Secondly, index will not be change when order of the field change ?

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if one write this

Code:

Browser("User").Page("Field Activity").Frame("FA_TYPE_CHAR").WebEdit("FA_CHAR:1$CHAR_VAL").Click

like this

Code:

Browser("User").Page("Field Activity").Frame("FA_TYPE_CHAR").WebEdit("FA_CHAR:"&RowNum&"$CHAR_VAL").Click

what does this means