Thread: [Dev-C++] Windows, COM, CoCreateInstance and OleInitialize
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From: Mark A. <am...@ho...> - 2005-08-11 15:19:23
|
Hi there!
I was trying all possibilities of DEV-C++ and I was pretty excited about =
it.
But I've encountered a problem.
In the Windows-operating-systems it is pretty important to use =
components (COM).
I've made a "windows application" project and added the following code:
----------------------------------------
const CLSID CLSID_Printing =3D =
{0x76A73923,0xD88C,0x11D6,{0xB5,0x51,0xEB,0xCE,0x0B,0x59,0xDA,0x72}};
const IID IID_IUnknown =3D =
{0x00000000,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
const IID IID_IClassFactory =
=3D{0x00000001,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
const CLSID CLSID_MySimpleObj =
=3D{0x14C0CBCC,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
const IID IID_IMySimpleObj =
=3D{0x14C0CBCD,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
interface IMySimpleObj : public IUnknown {
virtual HRESULT msg()=3D0;
};
int WINAPI WinMain (HINSTANCE hThisInstance,
HINSTANCE hPrevInstance,
LPSTR lpszArgument,
int nFunsterStil) {
MessageBox(0,"Test Start..","Project2",0);
//OleInitialize(0); //<-Creates a crash!
IUnknown * schaap;
schaap =3D NULL;
HRESULT hr;
hr =3D =
CoCreateInstance(CLSID_MySimpleObj,0,CLSCTX_INPROC,IID_IUnknown,(void**)&=
schaap);
if (schaap!=3DNULL) {
MessageBox(0,"Test CoCreateInstance Worked!","Project2",0);
schaap->Release();
schaap =3D NULL;
}
//OleUninitialize();
MessageBox(0,"Test Done..","Project2",0);
//HERE THE REST OF THE WinMain-Code!
}
----------------------------------------
Secondly: in the menu 'Project' -> 'Project Options' --tab-> Parameters =
--button-> Add Library or Object
I've added the OLE32.LIB from Microsoft Visual C++ 5.0.
The problem is that CoCreateInstance never succeeds in creating an =
object!
So I also tried to do a "OleInitialize(0)", but this one always results =
in crashing!
I hope this problem can be solved to meet the important requirement of =
using COM in DEV-C++ !
greetings,
Mark Ament |
|
From: Steve H. <st...@sj...> - 2005-08-11 17:06:03
|
Mark Ament wrote:
> Hi there!
> I was trying all possibilities of DEV-C++ and I was pretty excited
> about it.
> But I've encountered a problem.
> In the Windows-operating-systems it is pretty important to use
> components (COM).
> I've made a "windows application" project and added the following code:
> ----------------------------------------
> const CLSID CLSID_Printing =
> {0x76A73923,0xD88C,0x11D6,{0xB5,0x51,0xEB,0xCE,0x0B,0x59,0xDA,0x72}};
> const IID IID_IUnknown =
> {0x00000000,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
> const IID IID_IClassFactory
> ={0x00000001,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
> const CLSID CLSID_MySimpleObj
> ={0x14C0CBCC,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
> const IID IID_IMySimpleObj
> ={0x14C0CBCD,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
> interface IMySimpleObj : public IUnknown {
> virtual HRESULT msg()=0;
> };
> int WINAPI WinMain (HINSTANCE hThisInstance,
> HINSTANCE hPrevInstance,
> LPSTR lpszArgument,
> int nFunsterStil) {
> MessageBox(0,"Test Start..","Project2",0);
> //OleInitialize(0); //<-Creates a crash!
> IUnknown * schaap;
> schaap = NULL;
> HRESULT hr;
> hr =
> CoCreateInstance(CLSID_MySimpleObj,0,CLSCTX_INPROC,IID_IUnknown,(void**)&schaap);
> if (schaap!=NULL) {
> MessageBox(0,"Test CoCreateInstance Worked!","Project2",0);
> schaap->Release();
> schaap = NULL;
> }
> //OleUninitialize();
> MessageBox(0,"Test Done..","Project2",0);
> //HERE THE REST OF THE WinMain-Code!
> }
>
> ----------------------------------------
> Secondly: in the menu 'Project' -> 'Project Options' --tab->
> Parameters --button-> Add Library or Object
> I've added the OLE32.LIB from Microsoft Visual C++ 5.0.
> The problem is that CoCreateInstance never succeeds in creating an object!
> So I also tried to do a "OleInitialize(0)", but this one always
> results in crashing!
> I hope this problem can be solved to meet the important requirement of
> using COM in DEV-C++ !
> greetings,
> Mark Ament
Hi Mark,
I'm using COM without any problems.
I'm using the libraries that came with Dev-Cpp - Try using
Dev-Cpp\lib\libole32.a. This should work fine.
Regards,
Steve
--
Steve Higham
› st...@sj... <mailto:st...@sj...>
|
|
From: Mark A. <am...@ho...> - 2005-08-11 17:39:27
|
Hi Steve,
I'm using your suggestion, but it has no effect.
I still get an error from CoCreateInstance: 0x800401F0
It is CO_E_NOTINITIALIZED
'Failed to connect to server'
Surfing the internet results in hints that it may have something to do with
'MsiInstaller', 'Events'.
'Exchange Server 5.5 Service Pack 2 (SP2)', 'CoInitialize has not been
called'.
I tried using OleInitialize(..) or CoInitializeEx(..) but these crash!
I've now found the solution!
I use CoInitialize(NULL) in stead of CoInitializeEx(..)
Thanks for your help by the way :)
greetings,
Mark Ament
----- Original Message -----
From: "Steve Higham" <st...@sj...>
To: "Mark Ament" <am...@ho...>
Cc: <dev...@li...>
Sent: Thursday, August 11, 2005 7:05 PM
Subject: Re: [Dev-C++] Windows, COM, CoCreateInstance and OleInitialize
> Mark Ament wrote:
>
>> Hi there!
>> I was trying all possibilities of DEV-C++ and I was pretty excited about
>> it.
>> But I've encountered a problem.
>> In the Windows-operating-systems it is pretty important to use components
>> (COM).
>> I've made a "windows application" project and added the following code:
>> ----------------------------------------
>> const CLSID CLSID_Printing =
>> {0x76A73923,0xD88C,0x11D6,{0xB5,0x51,0xEB,0xCE,0x0B,0x59,0xDA,0x72}};
>> const IID IID_IUnknown =
>> {0x00000000,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
>> const IID IID_IClassFactory
>> ={0x00000001,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
>> const CLSID CLSID_MySimpleObj
>> ={0x14C0CBCC,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
>> const IID IID_IMySimpleObj
>> ={0x14C0CBCD,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
>> interface IMySimpleObj : public IUnknown {
>> virtual HRESULT msg()=0;
>> };
>> int WINAPI WinMain (HINSTANCE hThisInstance,
>> HINSTANCE hPrevInstance,
>> LPSTR lpszArgument,
>> int nFunsterStil) {
>> MessageBox(0,"Test Start..","Project2",0);
>> //OleInitialize(0); //<-Creates a crash!
>> IUnknown * schaap;
>> schaap = NULL;
>> HRESULT hr;
>> hr =
>> CoCreateInstance(CLSID_MySimpleObj,0,CLSCTX_INPROC,IID_IUnknown,(void**)&schaap);
>> if (schaap!=NULL) {
>> MessageBox(0,"Test CoCreateInstance Worked!","Project2",0);
>> schaap->Release();
>> schaap = NULL;
>> }
>> //OleUninitialize();
>> MessageBox(0,"Test Done..","Project2",0);
>> //HERE THE REST OF THE WinMain-Code!
>> }
>>
>> ----------------------------------------
>> Secondly: in the menu 'Project' -> 'Project Options' --tab->
>> Parameters --button-> Add Library or Object
>> I've added the OLE32.LIB from Microsoft Visual C++ 5.0.
>> The problem is that CoCreateInstance never succeeds in creating an
>> object!
>> So I also tried to do a "OleInitialize(0)", but this one always results
>> in crashing!
>> I hope this problem can be solved to meet the important requirement of
>> using COM in DEV-C++ !
>> greetings,
>> Mark Ament
>
> Hi Mark,
>
> I'm using COM without any problems.
>
> I'm using the libraries that came with Dev-Cpp - Try using
> Dev-Cpp\lib\libole32.a. This should work fine.
>
> Regards,
>
> Steve
>
> --
>
> Steve Higham
>
> › st...@sj... <mailto:st...@sj...>
>
>
|
|
From: Steve H. <st...@sj...> - 2005-08-11 19:36:15
|
Mark Ament wrote:
> Hi Steve,
>
> I'm using your suggestion, but it has no effect.
> I still get an error from CoCreateInstance: 0x800401F0
> It is CO_E_NOTINITIALIZED
> 'Failed to connect to server'
>
> Surfing the internet results in hints that it may have something to do
> with 'MsiInstaller', 'Events'.
> 'Exchange Server 5.5 Service Pack 2 (SP2)', 'CoInitialize has not been
> called'.
>
> I tried using OleInitialize(..) or CoInitializeEx(..) but these crash!
>
> I've now found the solution!
> I use CoInitialize(NULL) in stead of CoInitializeEx(..)
>
> Thanks for your help by the way :)
>
> greetings,
>
> Mark Ament
>
> ----- Original Message ----- From: "Steve Higham" <st...@sj...>
> To: "Mark Ament" <am...@ho...>
> Cc: <dev...@li...>
> Sent: Thursday, August 11, 2005 7:05 PM
> Subject: Re: [Dev-C++] Windows, COM, CoCreateInstance and OleInitialize
>
>
>> Mark Ament wrote:
>>
>>> Hi there!
>>> I was trying all possibilities of DEV-C++ and I was pretty excited
>>> about it.
>>> But I've encountered a problem.
>>> In the Windows-operating-systems it is pretty important to use
>>> components (COM).
>>> I've made a "windows application" project and added the following code:
>>> ----------------------------------------
>>> const CLSID CLSID_Printing =
>>> {0x76A73923,0xD88C,0x11D6,{0xB5,0x51,0xEB,0xCE,0x0B,0x59,0xDA,0x72}};
>>> const IID IID_IUnknown =
>>> {0x00000000,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
>>> const IID IID_IClassFactory
>>> ={0x00000001,0x0000,0x0000,{0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x46}};
>>> const CLSID CLSID_MySimpleObj
>>> ={0x14C0CBCC,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
>>> const IID IID_IMySimpleObj
>>> ={0x14C0CBCD,0x8E68,0x4BB0,{0xB4,0x49,0x2D,0x9D,0xFB,0x80,0x9A,0x16}};
>>> interface IMySimpleObj : public IUnknown {
>>> virtual HRESULT msg()=0;
>>> };
>>> int WINAPI WinMain (HINSTANCE hThisInstance,
>>> HINSTANCE hPrevInstance,
>>> LPSTR lpszArgument,
>>> int nFunsterStil) {
>>> MessageBox(0,"Test Start..","Project2",0);
>>> //OleInitialize(0); //<-Creates a crash!
>>> IUnknown * schaap;
>>> schaap = NULL;
>>> HRESULT hr;
>>> hr =
>>> CoCreateInstance(CLSID_MySimpleObj,0,CLSCTX_INPROC,IID_IUnknown,(void**)&schaap);
>>>
>>> if (schaap!=NULL) {
>>> MessageBox(0,"Test CoCreateInstance Worked!","Project2",0);
>>> schaap->Release();
>>> schaap = NULL;
>>> }
>>> //OleUninitialize();
>>> MessageBox(0,"Test Done..","Project2",0);
>>> //HERE THE REST OF THE WinMain-Code!
>>> }
>>>
>>> ----------------------------------------
>>> Secondly: in the menu 'Project' -> 'Project Options' --tab->
>>> Parameters --button-> Add Library or Object
>>> I've added the OLE32.LIB from Microsoft Visual C++ 5.0.
>>> The problem is that CoCreateInstance never succeeds in creating an
>>> object!
>>> So I also tried to do a "OleInitialize(0)", but this one always
>>> results in crashing!
>>> I hope this problem can be solved to meet the important requirement
>>> of using COM in DEV-C++ !
>>> greetings,
>>> Mark Ament
>>
>>
>> Hi Mark,
>>
>> I'm using COM without any problems.
>>
>> I'm using the libraries that came with Dev-Cpp - Try using
>> Dev-Cpp\lib\libole32.a. This should work fine.
>>
>> Regards,
>>
>> Steve
>>
>> --
>>
>> Steve Higham
>>
>> › st...@sj... <mailto:st...@sj...>
>>
>>
>
>
>
Hi Mark,
My code also uses CoInitialize(NULL).
Regards,
Steve
--
Steve Higham
› st...@sj... <mailto:st...@sj...>
|
