tylerd
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combining arrays
is there a quick and effecient way of combining 2 dynamic byte arrays? Im willing to try any solution however.
thanks
thanks
ASKER
thanks alot! just answer the question now and i'll give you the points
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You first need to declare the API in the Declarations part
Public Declare Sub CopyMem Lib "kernel32" Alias "RtlMoveMemory" (Destination As Any, Source As Any, ByVal Length As Long)
And here's the example source code
Dim a() As Byte
Dim b() As Byte
Dim c As Long
ReDim a(5)
ReDim b(3)
For c = 1 To 6
a(c - 1) = c
Next
For c = 1 To 4
b(c - 1) = c * 10
Next
ReDim Preserve a(5 + 4)
Call CopyMem(a(6), b(0), 4)
For c = 0 To UBound(a)
List1.AddItem a(c)
Next
Some background:
The API CopyMem takes three parameters. The third parameter is a count of bytes, in the example I want to copy all the items in the Byte Array b, which is 4 bytes. The second parameter is what item to start with. Here I want to start with b(0), then it copies all from b(0) and 4 bytes from there. This will copy all the b array. The first parameter is where to copy it to. I want to add it to the where the a array ended, and that's item with index 6.
Don't forget to ReDim Preserve the array to where you want to copy, if you don't you will copy over something else, destroying the data that is already there.
Remember to always double-check the parameters, if you use it wrong you WILL destroy data in the memory and get GPF's but if this API is correctly used it is to enourmous help.
Hope this helps.