How to use StructToPtr with SendMessage?

[SamSpade]

In my C# library I have many SendMessages like the following:

[DllImport("user32.dll", EntryPoint="SendMessage",CharSet=CharSet.Auto )]

public static extern int SendMessage(IntPtr hwnd, int wMsg, int wParam, ref
PARAFORMAT2 pf2);

I use this one like this:

Dim lSelectedParagraph As PARAFORMAT2

Rtf.SendMessage(gctlText.TxtHandle, Rtf.EM_GETPARAFORMAT, 0,
lSelectedParagraph)

So that I do not need to define a SendMesage for each usage, I think I could
define:

[DllImport("user32.dll", CharSet=CharSet.Auto, SetLastError=true)]public
static extern int SendMessage(

IntPtr hWnd, [MarshalAs(UnmanagedType.U4)] int Msg,IntPtr wParam, IntPtr
lParam);

Could someone show me how to write the VB SendMessage call that will use
this SendMessage??

I think if I have one example I can figure out how to do the others,

Thanks in advance

Thanks