frustrating parameter issue

[Vinz]

Hello everyone,

My question is part C# and part C++. Please don't kill me for bringing C#
inhere :-) Also please don't kill me for asking a n00b question, I'm still
new to C++/CLI and C#.


I have an assembly written in C++/CLI with a public function:

int MyClass::MyFunc tion(String ^x) {
x = "zzz";
return 0;
};


I want to call this function from a C# app and show the changed contents of
variable

MyClass TheClass = new MyClass();
String w = "m";
TheClass.MyFunc tion(w);
MessageBox.Show (w);


When executing, the messagebox shows 'm', and I want it to show 'zzz'.

What am I doing wrong here???

Thanks for reading sofar.

Vince.

[David Lowndes]

Re: frustrating parameter issue

>I want to call this function from a C# app and show the changed contents of

>variable

Vince,

You need to define the function parameter as a tracking reference -
see "% Tracking Reference" in MSDN.

Dave

[=?Utf-8?B?RGF2aWQgQW50b24=?=]

RE: frustrating parameter issue

int MyClass::MyFunc tion(String ^%x) {
x = "zzz";
return 0;
};

--
David Anton

https://www.tangiblesoftwaresolutions.com

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"Vinz" wrote:

Hello everyone,
>
My question is part C# and part C++. Please don't kill me for bringing C#
inhere :-) Also please don't kill me for asking a n00b question, I'm still
new to C++/CLI and C#.
>
>
I have an assembly written in C++/CLI with a public function:
>
int MyClass::MyFunc tion(String ^x) {
x = "zzz";
return 0;
};
>
>
I want to call this function from a C# app and show the changed contents of
variable
>
MyClass TheClass = new MyClass();
String w = "m";
TheClass.MyFunc tion(w);
MessageBox.Show (w);
>
>
When executing, the messagebox shows 'm', and I want it to show 'zzz'.
>
What am I doing wrong here???
>
Thanks for reading sofar.
>
Vince.
>
>
>

[Vinz]

Re: frustrating parameter issue

Thanks very much guys :-)

I tried to use the % before but that doesn't compile. ^% compiles though. I
had to also use ref x instead of just x in the C# call too btw.

Anyway, I got it working now, thanks a lot :-)

Vince.

"David Anton" <DavidAnton@dis cussions.micros oft.comwrote in message
news:D350ACB7-EDF2-4D50-BC99-81E0CFDCDC5C@mi crosoft.com...

int MyClass::MyFunc tion(String ^%x) {
x = "zzz";
return 0;
};
>
--
David Anton

https://www.tangiblesoftwaresolutions.com

Instant C#: VB to C# converter
Instant VB: C# to VB converter
Instant C++: C#/VB to C++ converter
Instant Python: C#/VB to Python converter
>
>
"Vinz" wrote:
>

>Hello everyone,
>>
>My question is part C# and part C++. Please don't kill me for bringing C#
>inhere :-) Also please don't kill me for asking a n00b question, I'm
>still
>new to C++/CLI and C#.
>>
>>
>I have an assembly written in C++/CLI with a public function:
>>
>int MyClass::MyFunc tion(String ^x) {
> x = "zzz";
> return 0;
>};
>>
>>
>I want to call this function from a C# app and show the changed contents
>of
>variable
>>
>MyClass TheClass = new MyClass();
>String w = "m";
>TheClass.MyFun ction(w);
>MessageBox.Sho w(w);
>>
>>
>When executing, the messagebox shows 'm', and I want it to show 'zzz'.
>>
>What am I doing wrong here???
>>
>Thanks for reading sofar.
>>
>Vince.
>>
>>
>>