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I've coded a dll in masm, it works when I use it with another program coded in masm or delphi but when I try to use it with VB I get the error:
Run-time error '453':
Can't find DLL entry point MyFunction in MyDll.dll

this is what I use when compiling the dll:
ml /c /coff /Cp c:\masm32\MyDll.asm
link /DLL /subsystem:windows /EXPORT:MyFunction /LIBPATH:c:\masm32\lib MyDll.obj

I have searched for a solution on this but havn't found anything that have solved the problem.

This is how I declare it in VB, the second parameter should be a pointer to a byte array, don't know how to declare that.

Declare Sub MyFunction Lib "MyDll.dll" (ProcessID As Long, ByRef Info() As Byte, InfoLength As Long)

How and when should I use ByVal and ByRef when declaring it?

I used dumpbin: dumpbin /exports MyDll.dll
And got this:

File Type: DLL



  Section contains the following exports for MyDll.dll



           0 characteristics

    42289478 time date stamp Fri Mar 04 18:01:44 2005

        0.00 version

           1 ordinal base

           1 number of functions

           1 number of names



    ordinal hint RVA      name



          1    0 00001023 MyFunction



  Summary



        1000 .data

        1000 .rdata

        1000 .reloc

        1000 .text