>I have created an EXE COM server in VFP that contains a function that accepts an array from the client, and fills that array with data. The array should be an array of byte, but for now, I would be happy if I could get an array of any data type to work.
>
>I have gotten this to work with a VFP client, but not with a C++ client.
>
>When I use a function statement that defines the incoming array as char @, C++ generates a wrapper from the TypeLib of the COM server that says the calling sequence is a VARIANT*. But, this doesn't work.
>
>Today, I thought that since C++ was sending a Variant, I would try declaring the function as follows:
>

>   FUNCTION GetFBDBlob(nFileID AS Integer, aBlobData AS Variant ) AS Integer
>

>This works with the VFP client when I call with a reference to a char array, like so:
>

>   DIMENSION aBlobData[nFileSize] AS char
>   nResult = oFBD.GetFBDBlob(nFileID, @aBlobData)
>

>
>In C++ I use the following code to set up a Variant and pass it to GetFBDBlob
>

>	SAFEARRAY* pSA = SafeArrayCreateVectorEx(VT_UI1, 0, nFileSize, NULL);
>	VARIANT vaBlobData;
>	VariantInit(&vaBlobData);
>	vaBlobData.vt = VT_ARRAY | VT_BYREF | VT_UI1;
>	vaBlobData.pparray = &pSA;
>	lResult = pFBDDBA->GetFBDBlob(nFileID, vaBlobData);
>

>
>I have also tried a variation of this:
>

>	SAFEARRAY* pSA = SafeArrayCreateVectorEx(VT_UI1, 0, nFileSize, NULL);
>	VARIANT vaBlobData;
>	VariantInit(&vaBlobData);
>	vaBlobData.vt = VT_ARRAY | VT_UI1;
>	vaBlobData.parray = pSA;
>	lResult = pFBDDBA->GetFBDBlob(nFileID, vaBlobData);
>

>
>GetFBDBlob() contains a call to ALEN right at the beginning: ALEN(aBlobData)
>
>While this works in VFP, either of my two formulations in the C++ client gets an error saying "ABLOBDATA is not an array"
>
>I have also modified this so that the VFP COM server is expecting a reference to a Variant. That also works with the VFP client, but not with the C++ client passing a pointer to the Variant.
>
>Surely there must be some syntax that allows me to pass an array by reference into a VFP COM server. Does anyone know what it is?
>
>Or, does anyone know of a strategy that will let me see where this is failing in VFP?
>
>Thanks,
>Jim

Can you pass a comma delimited string and have VFP put it into an array using ALINES() ? Just curious...

I do receive an array in VFP (and also in other places a variant which is seen in VFP as a collection and I have to reference it first and then step through it so it comes in as an 'object' that I process like a collection in VFP) from a C# com interop dll in some code, but that doesn't seem to be your situation....