user defined type

Hi, I'm a C++ programmer trying to work my way with VB for the first time. I would be grateful if someone could help me out on this one: I'm trying to pass a user defined type variable as a parameter in a call to a method in a C++ server (COM):

I get an error that sais that user defined types may not be passed ByVal, but the MSDN help sais that the default is byRef so can you please help me what I'm doing wrong:

This is the code :



Dim recipeParams as sADCRecipeParams
recipeParams.bstrProductName = "TestProduct111"
recipeParams.bstrLayerName = "Layer_A"
recipeParams.bstrObjectiveName = "BF_20x"
recipeParams.bstrRecipeName = "" 'no Recipe selected

sdiAdcAgent.SelectRecipeForClassification _
recipeParams, bstrLotID, bstrWaferID, _
nSlotNum, nTestNum, lSize, _
aBytes(0), nImageDimX, nImageDimY





TIA,
Avi

Make sure the put method has a [in, out] instead of a [in] and make sure the type is a *. It will not however conform to oleautomation attribute.

In ATL IDL you will get a warning MIDL2039 : interface does not conform to [oleautomation] attribute : [ Parameter 'newVal' of Procedure 'put_someProperty' ( Interface 'IWhatever' ) ]