CSharp / OLE

Thread View: borland.public.csharpbuilder.language.csharp

3 messages

[T] Back to Threads [V] Tree View [G] Group Articles

3 total messages Started by Looki VanDyke Tue, 17 Apr 2007 07:06

#129

Author: Looki VanDyke
Date: Tue, 17 Apr 2007 07:06

52 lines
1516 bytes

Hi,

I want to get a 
string value out of 
an 
activex-component.

I solved it easily 
in delphi:

var
     hlpstrptr 
      : WideString;
     hlp_string 
      : String;

...

 
ActiveXComponent.GetCreatorID(hlpstrptr); 
hlp_CreatorID := 
hlpstrptr;

but in C# ??

I only know that

     string hlpstr = 
"";

     result = 
axActiveXComponent1.GetCreatorID(ref 
hlpstr);


will not work, cause 
the 
"ActiveXComponent.GetCreatorID"-function 
fails
with "wrong 
parameter type".

So: hlpstr should be 
a pointer to a 
WideString (in 
"dephi-words")

How can I achive 
this with C#?

Best regards
Loki

Re: CSharp / OLE

#130

Author: Marc Rohloff TeamB
Date: Thu, 19 Apr 2007 03:16

28 lines
1802 bytes

On Tue, 17 Apr 2007 09:06:16 +0200, Looki VanDyke wrote:

> I only know that
>      string hlpstr = "";
> 
>      result = 
> axActiveXComponent1.GetCreatorID(ref 
> hlpstr);
> 
> will not work, cause the 
> "ActiveXComponent.GetCreatorID"-function 
> fails with "wrong parameter type".
> 
> So: hlpstr should be a pointer to a WideString (in 
> "dephi-words")
> How can I achive this with C#?

.NET doesn't have the concept of a pointer to a widestring.

The first thing to do would be to find out what the GetCreatorID
function expects as parameters, code insite should tell you this as
should a decent reflection tool.

What ActiveX are you trying to access?

-- 
Marc Rohloff [TeamB]
marc -at- marc rohloff -dot- com

Re: CSharp / OLE

#131

Author: Looki VanDyke
Date: Fri, 20 Apr 2007 07:33

58 lines
2273 bytes

Marc Rohloff [TeamB] 
schrieb:
> On Tue, 17 Apr 2007 09:06:16 +0200, Looki VanDyke wrote:
> 
>> I only know that
>>      string hlpstr = "";
>>
>>      result = 
>> axActiveXComponent1.GetCreatorID(ref 
>> hlpstr);
>>
>> will not work, cause the 
>> "ActiveXComponent.GetCreatorID"-function 
>> fails with "wrong parameter type".
>>
>> So: hlpstr should be a pointer to a WideString (in 
>> "dephi-words")
>> How can I achive this with C#?
> 
> .NET doesn't have the concept of a pointer to a widestring.
> 
> The first thing to do would be to find out what the GetCreatorID
> function expects as parameters, code insite should tell you this as
> should a decent reflection tool.
> 

The documentation of 
this routine says:
long 
GetCreatorID(BSTR 
FAR* 
pbstrCreatorID);

The result of this 
function is -4, a 
table in the 
documentation says 
that -4 is "invalid 
parameter" (buy the 
way you are right 
this error message 
is internally 
created by the 
activex component).
Never the less I got 
the same result when 
I tried
hlpstr : String
instead of
hlpstr : WideString
with delphi.
Therefor I need an 
equivalent 
expression for this 
in C#.

Thanks in advance
Loki.

Thread Navigation

This is a paginated view of messages in the thread with full content displayed inline.

Messages are displayed in chronological order, with the original post highlighted in green.

Use pagination controls to navigate through all messages in large threads.

Back to All Threads