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Syntax
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Mid[$](variable,start[,length]) = newvalue
MidB[$](variable,start[,length]) = newvalue
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Description
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Replaces one part of a string with another.
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Comments
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The
Mid/Mid$
statements take the following parameters:
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Parameter
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Description
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variable
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String or Variant variable to be changed.
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start
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Integer specifying the character position (for Mid and Mid$) or byte position (for MidB and MidB$) within variable where replacement begins. If start is greater than the length of variable, then variable remains unchanged.
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length
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Integer specifying the number of characters or bytes to change. If this parameter is omitted, then the entire string is changed, starting at start.
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newvalue
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Expression used as the replacement. This expression must be convertible to a String.
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The resultant string is never longer than the original length of variable.
With Mid and MidB, variable must be a Variant variable convertible to a String, and newvalue is any expression convertible to a string. A runtime error is generated if either variant is NULL.
Statements are used to replace the following.
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Statement
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Replaces
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MidB and MidB$
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Sub-string of bytes
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Mid and Mid$
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Sub-string of characters
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Example
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'This example displays a substring from the middle of a
'string variable using the Mid$ function, replacing the
'first four characters with "NEW " using the Mid$ statement.
Const crlf = Chr$(13) + Chr$(10)
Sub Main()
a$ = "This is the Main string containing text."
b$ = Mid$(a$,13,Len(a$))
Mid$(b$,1) = "NEW "
End Sub
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See Also
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Mid, Mid$, MidB, MidB$ (functions), Option Compare (statement)
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