How to define a global COM object in VC++8

[Minfu Lu]

Hi,

I need define a global COM object in a VC++8 project. But when I compile it,
I get a error message:
error C3145:'ComLibC1 ': global or static variable may not have managed type
MYCOMLib::Class 1^ (MYCOMLib is a COM Wrapper built in VC++6).
My code looks like this:

namespace MyApp
{
(some global variables)
MYCOMLib::Class 1^ ComLibC1;
...

public ref class MainForm : public System::Windows ::Forms::Form
{
public:
MainForm(void)
{
...
Anybody can help me to solve this problem?
Thanks,

Minfu

[Bruno van Dooren]

> I need define a global COM object in a VC++8 project. But when I compile

it,
I get a error message:
error C3145:'ComLibC1 ': global or static variable may not have managed
type
MYCOMLib::Class 1^ (MYCOMLib is a COM Wrapper built in VC++6).
My code looks like this:

namespace MyApp
{
(some global variables)
MYCOMLib::Class 1^ ComLibC1;
...

public ref class MainForm : public System::Windows ::Forms::Form
{
public:
MainForm(void)
{
...

Hi,
If you look at the explanation of C3145, you'll see that this happens if you
define CLR object outside function scope.

Try this:
public ref class MainForm : public System::Windows ::Forms::Form
{
private:
static MYCOMLib::Class 1^ ComLibC1;

public:
MainForm(void)
{

instead of this
MYCOMLib::Class 1^ ComLibC1; //should be in a class scope to aboid C3145

--

Kind regards,
Bruno van Dooren
br************* *********@hotma il.com
Remove only "_nos_pam"

[Minfu Lu]

Hi Bruno.

Thank you for the advice. But how can I get access the 'global object
ComLibC1 in other classes?

Minfu
"Bruno van Dooren" wrote:

Hi,
If you look at the explanation of C3145, you'll see that this happens if you
define CLR object outside function scope.

Try this:
public ref class MainForm : public System::Windows ::Forms::Form
{
private:
static MYCOMLib::Class 1^ ComLibC1;

public:
MainForm(void)
{

instead of this
MYCOMLib::Class 1^ ComLibC1; //should be in a class scope to aboid C3145

--

Kind regards,
Bruno van Dooren
br************* *********@hotma il.com
Remove only "_nos_pam"

[Bruno van Dooren]

> Hi Bruno.

Thank you for the advice. But how can I get access the 'global object
ComLibC1 in other classes?

Minfu

Hi,

What you can do is to make a class with only some static members like this:

ref class GlobalObjects{
public:
static MYCOMLib::Class 1^ ComLibC1;
};

That way you can simply use GlobalObjects:: ComLibC1 as a global varible.

--

Kind regards,
Bruno van Dooren
br************* *********@hotma il.com
Remove only "_nos_pam"

[Minfu Lu]

Thanks Bruno. It works.

Minfu