Confused about P/Invoke and .NET CF - MissingMethodException

[John Kingston]

I am confused on how to use an existing dll written in VC++ ver 6
(written originally for the desktop) with a smart device project. I
am writing my app using VS2003 in VB.

I have declared it as follows:


Public Declare Function tx_opc167 Lib "roccom.dll" (ByVal irocadd As
Short, ByVal irocgrp As Short, ByVal iRocType As Short, ByVal iLogical
As Short, ByVal inum_parm As Short, ByVal istart_parm As Short) As
Short



I do not get any build errors but when I call the function, I get a
MissingMethodException error.

Here is the call:

xval = tx_opc167(RocAdd, RocGrp, T, L, N, P)

I have copied the DLL to the device into the directory with the exe
as well as in the \Windows directory. My questions are:

1) Will the DLL work since it was originally written for the desktop?
2) If it won't work, how do I migrate the code (I have the source)?
3) Am I doing it wrong? If so, what is my error?

Any help is greatly apreciated.

John

 

[Paul G. Tobey [eMVP]]

You can't use that compiler. It won't allow you to target ARM processors.

Paul T.