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Syntax
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Mid[$](string, start [,length])
MidB[$](string, start [,length])
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Description
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Returns a sub-string of the specified string, beginning with start, for length characters (for Mid and Mid$) or bytes (for MidB and MidB$).
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Comments
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The functions start and length are:
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Functions
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Start and Length of Return
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Mid and Mid$
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Sub-string starting at character position start and will be length characters long
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MidB and MidB$
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Sub-string starting at byte position start and will be length bytes long.
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The functions return the following.
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Functions
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Return
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Mid$ and MidB
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String
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Mid and MidB
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String variant
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The returned sub-string starts at character position start and will be length characters long.
Mid$
returns a
String
, whereas
Mid
returns a
String
variant.
The
Mid/Mid$
functions take the following parameters:
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Parameter
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Description
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string
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Any String expression containing the text from which data is returned.
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start
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Integer specifying the position where the sub-string begins. If start is greater than the length of string, then a zero-length string is returned.
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length
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Integer specifying the number of characters or bytes to return. If this parameter is omitted, then the entire string is returned, starting at start.
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The
Mid
function will return
Null
text is
Null
.
The MidB and MidB$ functions are used to return a sub-string of bytes from a string containing byte data.
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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 and replaces 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$,1) = NEW "
MsgBox a$ & crlf & b$
End Sub
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See Also
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InStr, InStrB (functions), Option Compare (statement), Mid, Mid$, MidB, MidB$ (statements)
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