Is this possible?

[mitch]

In a c# client I have the following:

double [] data = {1.0,2.0,3.0,4. 0};
I have an OCX wriiten in c++ using dev studio 6.0.
Can I pass the array to the OCX? How would you do this?
I've looked and looked and failed so far. Is it possible?
Thanks,
Mitch.

[Nicholas Paldino [.NET/C# MVP]]

Mitch,

Yes, you can, assuming that the method on the object from the OCX is
expecting a SAFEARRAY of doubles.

Have you imported the OCX into .NET? You can easily do this by adding
it to your toolbox (there is a COM tab when you configure the toolbox).

Hope this helps.
--
- Nicholas Paldino [.NET/C# MVP]
- mv*@spam.guard. caspershouse.co m

<mi***@bmtmis.d emon.co.uk> wrote in message
news:11******** *************@v 46g2000cwv.goog legroups.com...

In a c# client I have the following:

double [] data = {1.0,2.0,3.0,4. 0};
I have an OCX wriiten in c++ using dev studio 6.0.
Can I pass the array to the OCX? How would you do this?
I've looked and looked and failed so far. Is it possible?
Thanks,
Mitch.

[mitch]

Hello,

Thanks for your reply.

You sound condifent - like someone whose done it before? I can't.

I have successfully imported the OCX into the toolbox and have a copy
on a form.

In the .odl file I declare:

[id(3)] void UseArray([in]SAFEARRAY(doubl e) pArray);

In the ActiveX ctl's header I declare:

afx_msg void UseArray(SAFEAR RAY* pArray);

and in the ctl's dispatch map I have:

DISP_FUNCTION(C TestOCXCtrl, "UseArray", UseArray, VT_EMPTY, VTS_R8)

Is this correct? It all compiles.

In c# I have:

double [] data = {1.0,2.0,3.0,4. 0};
axTestOCX1.UseA rray(pArray);

And I get and Interop COMException of type mismatch.

It should be so simple. Where am I going so wrong?

Mitch.

[mitch]

Typo: Should read:

In c# I have:

System.Array pArray = new double[10];
axTestOCX1.UseA rray(pArray);

And I get and Interop COMException of type mismatch.

It should be so simple. Where am I going so wrong?