Hi,
I am having problems converting from a Structure to a ByteArray. The
main problem being that the structure contains a variable length array,
which cannot be defined within the structure definition. A example of
my code is shown below and when this is run, an error is produced
within the BuildByteArray function due to the structure size not being
set.
Any help would be greatly appreciated.
CODE
----
Public g_by2DOpBuffer(1023) As Byte
Public Structure Struct1
Public Field1 As Integer
Public Array1() As Integer
End Structure
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
Dim message As New Struct1()
message.Array1 = 2
Redim message.Array1(message.Field1)
BuildByteArray(message, g_by2DOpBuffer)
End Sub
Public Function BuildByteArray(ByVal UserData As Object, ByVal
ByteArray() As Byte) As Byte()
Dim Ptr As IntPtr =
Marshal.AllocHGlobal(Marshal.SizeOf(UserData))
'now copy strcutre to Ptr pointer
Marshal.StructureToPtr(UserData, Ptr, False)
Marshal.Copy(Ptr, ByteArray, 0, Marshal.SizeOf(UserData))
Marshal.FreeHGlobal(Ptr)
End Function
