COM

[Duncan Winn]

Does anyone know how to access a COM component from VC++ 7???

Thanks for any help, and sorry if this is an inappropriate place to post
this question, but I did not know which user group to post it on.

[Carl Daniel [VC++ MVP]]

Re: COM

Duncan Winn wrote:[color=blue]
> Does anyone know how to access a COM component from VC++ 7???[/color]

For starters, try looking up

#import
CoInitialize
CoCreateInstanc e

in your VC/MSDN documentation. There are myriad COM samples, including 136
samples in the Windows Platform SDK (which you can download from
http://www.microsoft.com/msdownload/...dk/sdkupdate/).

-cd

[chris]

COM

If the component includes a type library, you can import
the type library and use an interface pointer to access
methods. Something like this:
#import "MyComponent.dl l" named_guids //import the dll

#include "MyComponent.tl h" //include the type library

Declare an interface pointer to the class:
MyCom::IComCls pMyCom;

Use the pointer to create an instance of the object
pMyCom.CreateIn stance(MyCom::C LSID_CMyCom);

Use the pointer:
pMyCom->SomeWork(param 1, param2);


If no type library, you can do the following:
#include "MyComponent_i. c"

IComClasPtr pMyCom; //define an interface pointer
HRESULT hr;

Use the pointer to create an instance of the object
hr = pMyCom.CreateIn stance(CLSID_CM yCom);
//some code here to check if succeeded

Use the pointer:
hr = pMyCom->SomeWork(param 1, param2);
[color=blue]
>-----Original Message-----
>Does anyone know how to access a COM component from VC++[/color]
7???[color=blue]
>
>Thanks for any help, and sorry if this is an[/color]
inappropriate place to post[color=blue]
>this question, but I did not know which user group to[/color]
post it on.[color=blue]
>
>
>.
>[/color]

[Carl Daniel [VC++ MVP]]

Re: COM

chris wrote:[color=blue]
> If the component includes a type library, you can import
> the type library and use an interface pointer to access
> methods. Something like this:
> #import "MyComponent.dl l" named_guids //import the dll
>
> #include "MyComponent.tl h" //include the type library[/color]

You should never directly #include a .tlh file - the #import directive
already includes the file for you.

-cd