returning array and VARIANT problem

[Liveo]

I am attempting to use an ActiveX control and I need to access the return from a function defined in the control wrapper class as :
VARIANT C_Protocol::GET_WORKTABLE_DATA(BSTR* sWorktableFile)



I have a VB example that calls it with

Dim vWorkTable As Variant

With AtiveXCtrl

vWorkTable = .THE_FUNCTION (...)

What I want to know is what type do I equate the call to in C++. It is defined as a

variant/string (1 to 12, 1 to 2)

in VB.

Thanks,

Paul

[shaikh_intekhab]

You can use CString.
See my example at
http://atcsoft.freeservers.com/thele...TL/sample2.htm


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[Liveo]

Thanks for the reply.

As far as I can tell this is not quite what I was asking for. I am writing a C++ function that calls up a VB ActiveX control. The control returns an array. I need to know how IO can get access to this array from my C++ code.

Thanks again,

Paul

[NextMoveBX]

Have a look at the vt member of the VARIANT, which will tell you what type it is. If it's an array (VT_ARRAY) then Automation provides a load of SafeArrayXXX functions to manipulate the underlying SAFEARRAY object (the parray member of the VARIANT). For example:VARIANT v = <function call>
if (v.vt & VT_ARRAY)
{
// get the dimensions of the array
UINT nDim = SafeArrayGetDim(v.parray);

// you can get the size of the array using
// SafeArrayGetLBound and SafeArrayGetUBound

void* pData;

HRESULT hr = SafeArrayAccessData(v.parray,&pData);
if (SUCCEEDED(hr))
{
// pData now points to the array data
SafeArrayUnaccessData(v.parray);
}
}