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VBHowTo_MidStatement

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Did you know you can use Mid$ not only as a function but also as a Statement? Visual Basic 6 has a special implementation for Mid$ so it can be used as a statement to paste a string within an already existing string, without having to reallocate memory, making it much faster than string addition using string1 & string2

sText = "Did you know about Mid$?"
Mid$(sText, 19, 4) = "this"
- sText -
"Did you know about this?"

You can also ommit the length if you wish:

sText = "Did you know about Mid$?"
Mid$(sText, 19) = "this"
- sText -
"Did you know about this?"

When the string you are trying to insert is larger than the length of the string it is cut off:

sText = "Did you know about Mid$?"
Mid$(sText, 14, 22) = "it cuts off the string?"
- sText -
"Did you know it cuts off"

Here too, the Length can be omitted.

Using the Mid$ statement can be much faster when working with large strings and can be used to highly optimize code.

A good article about how to use this to optimize 'string concatenation' is found on MSDN Library
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