ActiveX DLL Functions

[Jeff Barnes]

Hi Everybody,

I have an ActiveX DLL that I need to call functions from.

I have not tried any ActiveX before and do not know where to start.

Can someone give me some pointers as to how to call functions inside an ActiveX DLL.


Thanks,

[Antonio Linares]

Jeff,

Please make a search for TActiveX in these forums.

There are many examples

[Antonio Linares]

[Jeff Barnes]

Antonio,

I've been looking at the different posts but I can not see how I tell my program that I want to use MyFile.DLL.

It looks like once I get that figured out I would be using commands like:

oActiveX:DO("MyFunction")

Is that correct?

[Jeff Barnes]

I guess step one is:

hPOX := LoadLibrary("\DLL\MyFile.DLL")



But how do I setup the oActiveX object?

[Antonio Linares]

Jeff,

The first step is to know the PROGID (is a string) of the ActiveX that you are going to use.

i.e. for Microsoft Excell the progid is "OWC11.Spreadsheet"

Whats the activex that you are going to use ?

[Jeff Barnes]

it is a 3rd party ActiveX that is used to control a medical device.

Any idea on how I would find the PROGID.

I looked at the DLL file with OleView (via the ITypeLib Viewer) but I can not see anything that looks like the ID.

[Antonio Linares]

Jeff,

Don't you have access to that ActiveX docs ?

You can also use its GUID instead of its PROGID ( http://en.wikipedia.org/wiki/Globally_Unique_Identifier ) which usually looks as a long sequence of numbers separated by "-" and between "{" and "}"

Have you tried to instantiate the ActiveX from VB and review its properties ?

[Enrico Maria Giordano]

Try this:

828B8942-5924-4BD3-963D-20786181A6A4


EMG

[Jeff Barnes]

When I try to do:


oPulseOX = TActiveX():New( oMainWnd, "{828B8942-5924-4BD3-963D-20786181A6A4}" )

I get an empty white box in the upper left corner and the windows error:

EzSat.exe has encountered a problem and needs to close. We are sorry for the inconvenience.

Is there something I need to link into my app?

Thanks,

[Antonio Linares]

Jeff,

Do you get an error.log file ?

[Jeff Barnes]

Sorry, no error.log file is generated.

[Antonio Linares]

Jeff,

Have you tried that ActiveX with Visual Basic ?

[Jeff Barnes]

Antonio,

I have no way to test with Vb.

[James Bott]

Jeff,

I am no ActiveX expert, but if I remember correctly ActiveX components have to be registered in the registry. You might do a Google on it.

James