Pointer to a structure?

[Icyculyr]

I'm doing this:
SendMessage(hWnd, LVM_GETITEM, Nothing, @), which @ should be a pointer to a structure called LVITEM, which I've made, but how do I make a pointer to a structure in Visual Basic .NET 2008??

IE:

Dim liItem As New LVITEM()

SendMessage(hWnd, LVM_GETITEM, Nothing, Pointer(liItem))

How do I do this?

Cheers
Icyculyr

[chris128]

I'm sure there's a method in the InteropServices namespace that is called something like PtrToStructure that will do what you want. I used it the other day, I'll find out its exact name/location later if you havent already got it

EDIT: actually having read your question again, I think your going about this the wrong way. You dont want to be going from a pointer to a structure, you want to be going from a structure to a pointer. I'll see if there's a method for that, I think there is..

[chris128]

Yeah, here it is:

System.Runtime.InteropServices.Marshal.StructureToPtr(STRUCTURE_HERE, POINTER_HERE, True)

[Icyculyr]

Thanks, does anyone know what the value for LVM_GETITEM and LVM_DELETEITEM??

Cheers
Icyculyr

[chris128]

Tried searching MSDN?
http://msdn.microsoft.com/en-us/bb774953.aspx

[Icyculyr]

Thanks, 2 things, How would I write out the LVITEM structure it's very complex (to me) to convert to VB.NET 08, I have tried, and I really doubt it would work... can anyone help with that?

LVITEM (Mine)

#Region " [LVITEM] "
    Public Structure LVITEM
        Dim mask As UInteger
        Dim iItem As Integer
        Dim iSubItem As Integer
        Dim state As UInteger
        Dim stateMask As UInteger
        Dim pszText As String
        Dim cchTextMax As Integer
        Dim iImage As Integer
        Dim lParam As IntPtr
        Dim iIndent As Integer
        Dim iGroupId As Integer
        Dim cColumns As UInteger
        Dim puColumns As IntPtr
    End Structure
#End Region

Also, I did not see the value for LVM_GETITEM, I know how to use it, but when using the SendMessage API, what value would LVM_GETITEM have, would it be 1300? or 5610, I did not see any value on the MSDN page you gave me.

Cheers
Icyculyr