expression

Required. String expression containing substring to replace.

find

Required. Substring being searched for.

replacewith

Required. Replacement substring.

start

Optional. Position within expression where substring search is to begin. If omitted, 1 is assumed. Must be used in conjunction with count.

count

Optional. Number of substring substitutions to perform. If omitted, the default value is -1, which means make all possible substitutions. Must be used in conjunction with start.

compare

Optional. Numeric value indicating the kind of comparison to use when evaluating substrings. See Settings section for values. If omitted, the default value is 0, which means perform a binary comparison.

The compare argument can have the following values:

Replace returns the following values:

The return value of the Replace function is a string, with substitutions made, that begins at the position specified by start and concludes at the end of the expression string. It is not a copy of the original string from start to finish.

The following example uses the Replace function to return a string:

' This is a binary comparison (because the last argument is omitted),
' so the comparison is case-sensitive.
' Returns ABC123def
Result = Replace ("ABC123abc", "abc", "def")

' This is a text comparison, so the comparison is case-insensitive.
' Returns def123def
Result = Replace ("ABC123abc", "abc", "def", 1, -1, vbTextCompare)

Version 2

Reference