interop

[ZhangZQ]

I created a ocx that has a method,

[id(5), helpstring("·½· ¨Test1")] void Test1(VARIANT* a);

the implementation is
void Cocx030820Ctrl: :Test1(VARIANT* a)
{
try
{
//see here
AFX_MANAGE_STAT E(AfxGetStaticM oduleState());

ST_PRINT* m;
//get data
m=(ST_PRINT*)a;
CString s;
s.Format("%d,%d ,%s,%c",m->i,m->l,m->s,m->mSTRU1.c);
MessageBox(s);
}
catch(...)
{
MessageBox("f") ;
}
}

and the ST_PRINT definition is

#ifndef IOPRINT
#define IOPRINT
typedef struct
{
unsigned char a[11];
unsigned char b[9];
char c;
}STRU1;

typedef struct
{
unsigned char Tran[11];
unsigned char TermId[9];
STRU1 mSTRU1;
char c;
int i;
long l;
double d;
char s[10];
}ST_PRINT;

#endif

My question is how to call the Test1 method in C#
//ST_PRINT
object obj=new object();
how can I set the field value of obj.
axocx0308201.Te st1(ref b3);




Thank you very much!

[Mattias Sjögren]

Re: interop

[color=blue]
>the implementation is
>void Cocx030820Ctrl: :Test1(VARIANT* a)
>{
> try
> {
> //see here
> AFX_MANAGE_STAT E(AfxGetStaticM oduleState());
>
> ST_PRINT* m;
> //get data
> m=(ST_PRINT*)a;[/color]

These kinds of hacks might work in C++, but not in C#. Why do you make
the parameter type a VARIANT* when it really isn't?



Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org

http://www.msjogren.net/dotnet/

Please reply only to the newsgroup.

[ZhangZQ]

Re: interop

Dear Mattias,

It is necessary, because that OCX is the third party product, I have to use
it but can not change it, is it possible to do that?

Thank you very much!


ZhangZQ


"Mattias Sjögren" <mattias.dont.w ant.spam@mvps.o rg> wrote in message
news:eZShNpkoDH A.688@TK2MSFTNG P10.phx.gbl...[color=blue]
>[color=green]
> >the implementation is
> >void Cocx030820Ctrl: :Test1(VARIANT* a)
> >{
> > try
> > {
> > //see here
> > AFX_MANAGE_STAT E(AfxGetStaticM oduleState());
> >
> > ST_PRINT* m;
> > //get data
> > m=(ST_PRINT*)a;[/color]
>
> These kinds of hacks might work in C++, but not in C#. Why do you make
> the parameter type a VARIANT* when it really isn't?
>
>
>
> Mattias
>
> --
> Mattias Sjögren [MVP] mattias @ mvps.org
> http://www.msjogren.net/dotnet/
> Please reply only to the newsgroup.[/color]

[Mattias Sjögren]

Re: interop

[color=blue]
>It is necessary, because that OCX is the third party product, I have to use
>it but can not change it, is it possible to do that?[/color]

Only if you change the managed definition of the method to take an
IntPtr or a ST_PRINT& parameter instead.



Mattias

--
Mattias Sjögren [MVP] mattias @ mvps.org

http://www.msjogren.net/dotnet/

Please reply only to the newsgroup.