Re: Thanks, but that isn't a problem - COM Discussion Boards

Problem with Word automation/Shapes/AddCurve

8-Mar-04 17:43

"Invalid Number of Parameters"

This isn't my best day... I get some very strange bugs...

I use MS Visual Studio .NET typelib wizard to create a class for CanvasShapes Word object. I obtain the object, then I call one simple method of it. Simple textbook thing.

And I get the error message: "Invalid Number of Parameters"! Not during compilation, but during runtime!!!

W_Shapes sh = wdoc.get_Shapes();
W_CanvasShapes csh = sh.AddCanvas(0,0,500,500, covOptional);
csh.AddLine(0,0,100,200);
Produces the error!

What is going on here?

8-Mar-04 15:15

Hi!

I try to do very simple thing:

- Start Word from Visual C++/MFC OLE automation
- Get Shapes object
- Use AddCurve to add Beizer curve

When I run the application, I get error message:
The specified value is out of range.

I tried to do all sorts of things, to pass different types to as COleSafeArray elements, change the value of vertices... nothing works!

When I use AddLine, everything works without a glitch.

////////////////

_Shapes sh = wdoc.GetShapes();

COleSafeArray saRet;
DWORD numElements[2];
numElements[0] = 2;
numElements[1] = 2;

short sngArray[2][2];
sngArray[0][0] = 91;
sngArray[0][1] = 92;
sngArray[1][0] = 93; //50;
sngArray[1][1] = 94; //50;
/*sngArray[2][0] = 0; //100;
sngArray[2][1] = 0;

sngArray[3][0] = 0; //300;
sngArray[3][1] = 0;*/

long index[2];

// Create a double safe array
saRet.Create(VT_R4,2,numElements);

// Fill the array with data.
for (int iRow = 0; iRow < 2; iRow++) {
for (int iCol = 0; iCol < 2; iCol++) {
index[0]=iRow;
index[1]=iCol;
float d = sngArray[iRow][iCol];
// saRet.PutElement(index, COleVariant(d));
saRet.PutElement(index, &d);
}
}

sh.AddCurve(saRet, covOptional);
/////////////////

Re: Problem with Word automation/Shapes/AddCurve

Member 3538108-Mar-04 15:22

Re: Problem with Word automation/Shapes/AddCurve

8-Mar-04 15:22

PS Alternativelly, if you have any Visual C++/MFC code that uses AddCurve and works - it would be great! I could not findy anything on either google or yahoo... depressing!

Vi28-Mar-04 18:45

Vi2

8-Mar-04 18:45

You should specify more points, because MSDN says: "Note that you must always specify 3n + 1 points, where n is the number of segments in the curve".

With best wishes,
Vita

Thanks, but that isn't a problem

Member 3538108-Mar-04 19:10

Re: Thanks, but that isn't a problem

8-Mar-04 19:10

Thanks, but that isn't a problem - when I specify either 4 or 7 points, it sitll does not work. Ie, this code fails the same way:

COleSafeArray saRet;
DWORD numElements[2];
numElements[0] = 7;
numElements[1] = 2;

short sngArray[7][2];
sngArray[0][0] = 0;
sngArray[0][1] = 0;

sngArray[1][0] = 100; //50;
sngArray[1][1] = 200; //50;

sngArray[2][0] = 0; //100;
sngArray[2][1] = 0;

sngArray[3][0] = 0; //300;
sngArray[3][1] = 0;

sngArray[4][0] = 0; //300;
sngArray[4][1] = 0;

sngArray[5][0] = 0; //300;
sngArray[5][1] = 0;

sngArray[6][0] = 0; //300;
sngArray[6][1] = 0;

long index[2];

// Create a double safe array
saRet.Create(VT_R4,2,numElements);

// Fill the array with data.
for (int iRow = 0; iRow < 7; iRow++) {
for (int iCol = 0; iCol < 2; iCol++) {
index[0]=iRow;
index[1]=iCol;
float d = sngArray[iRow][iCol];
saRet.PutElement(index, &d);
}
}

Vi28-Mar-04 19:26

Vi2

8-Mar-04 19:26

If the problem does not associated with the dimension of the array, hence it happens by "covOptional" in "sh.AddCurve(saRet, covOptional)". How you specify this value? COleVariant covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR)?

With best wishes,
Vita

Re: Thanks, but that isn't a problem

Member 3538108-Mar-04 23:20

I can't beleive that I wasted so much time with this

8-Mar-04 23:20

Yes, exactly as:
covOptional((long)DISP_E_PARAMNOTFOUND, VT_ERROR)

how should I specify it otherwise?!

Member 3538109-Mar-04 0:56

MFC executable registration.

9-Mar-04 0:56

I can't beleive that I wasted so much time with this... and still I did not get it to work! What a day...

oleg638-Mar-04 12:25

oleg63

8-Mar-04 12:25

Hi All,

My MFC based EXE COM server have to be automatically installed end registered by Install Shield Express, but MFC based executable COM doesn't generate appropriate Register/Unregister routines.

How it's can be implemented?
Thanks, Oleg.

Re: MFC executable registration.

Mike Dimmick16-Mar-04 2:31

Mike Dimmick

16-Mar-04 2:31

The convention for an EXE is that passing the parameter /regserver will register the server, while passing /unregserver will unregister it.

The Wizard-generated MFC code will have produced an override of CWinApp::InitInstance which creates a CCommandLineInfo which is then passed to CWinApp::ParseCommandLine. When this returns it then calls CWinApp::ProcessShellCommand.

You can hook into this by deriving your own class from CCommandLineInfo, overriding ParseParam, and performing the necessary registration steps in response to the appropriate command line. You should exit (by returning FALSE from InitInstance) after processing a registration flag.

You can use AfxOleRegisterTypeLib to register your type library and COleObjectFactoryEx::UpdateRegistryAll to register all the known classes.

Stability. What an interesting concept. -- Chris Maunder

Re: MFC executable registration.

oleg6316-Mar-04 4:14

oleg63

16-Mar-04 4:14

Thanks Mike,
I've found the simpliest solution.

enum eRegistration{eNothing, eRegisterServer, eUNRegisterServer};
eRegistration process_program_arguments(LPSTR m_lpCmdLine);
...
App::InitInstance()
{
...
if (cmdInfo.m_bRunEmbedded || cmdInfo.m_bRunAutomated)
return TRUE;

if (cmdInfo.m_nShellCommand == CCommandLineInfo::AppUnregister)
{
m_server.UpdateRegistry(OAT_DISPATCH_OBJECT);
COleObjectFactory::UpdateRegistryAll(FALSE);
}
else
{
m_server.UpdateRegistry(OAT_DISPATCH_OBJECT);
COleObjectFactory::UpdateRegistryAll();
}
if (!ProcessShellCommand(cmdInfo)) // Dispatch commands specified on the command line
return FALSE;

if(process_program_arguments(m_lpCmdLine))
return FALSE;

...
...
}

eRegistration process_program_arguments(LPSTR lpCmdLine)
{
char* lpProgArg = _strdup( lpCmdLine );
char seps[] = " -/"; // program arguments separators
char Register[] = "regserver";
char UNRegister[] = "unregserver";

eRegistration ret = eNothing;

char *token = strtok( lpProgArg, seps );
while( token != NULL )
{
if ( !strcmp(token,Register) )
{
ret = eRegisterServer;
}
if ( !strcmp(token,UNRegister) )
{
ret = eUNRegisterServer;
}
token = strtok( NULL, seps );
}
free( lpProgArg );
return(ret);
}

In StdAfx.cpp
#include <afxctl.h>

That's it.
Thanks for hint.
Oleg

ussoftproblem with COM server registration???

pelos7-Mar-04 4:41

7-Mar-04 4:41

hello!

I am learning the MS COM/DCOM architecture.
I ve developed a few simple client/server programs and I ve obtained always the same result: I think client cannot get the object.

I ve used C++ with Microsift Visual C++ 6.0.

To make the server I ve followed the next steps:
1- create an ATL COM AppWizard Project.
2- EXE Server.
3- New ATL object (simple object)
4- Add methods to Interface
5- Code the methods.
6- Build the project
it shows me:
Compiling resources...
Compiling...
Linking...
Performing registration
Server registration done!

..and client is something like this:

const IID IID_IHelloObj = {0x389A6DD0,0xC789,0x463F,{0x87,0xD5,0x8C,0x3A,0x51,0xDC,0xB4,0xDF}};
const CLSID CLSID_HelloObj = {0x1635DA5A,0xD02E,0x4049,{0xB9,0x21,0x07,0xE1,0x81,0x55,0xB2,0x0E}};

void main()
{
HRESULT hr;
IHelloObj *IHello;
int num; // to test the service

hr = CoInitialize(0);
if(SUCCEEDED(hr))
{
hr = CoCreateInstance(CLSID_HelloObj,
NULL, CLSCTX_INPROC_SERVER,
IID_IHelloObj,
(void**)&IHello);

if(SUCCEEDED(hr))
{
hr=IHello->GetNumber(&num);
hr=IHello->Release();
}
else
cout << "error";
}
CoUninitialize();
}

This is all what i ve done.
Must i do more things to run the service?
What can be the cause of the error?

Thanks in advance!!!

Steve S7-Mar-04 22:03

Steve S

7-Mar-04 22:03

0. What value is in hr, and when? This will tell you more about what's going wrong.
1. Are you sure you're using the correct interface IDs and class IDs?
2. Have you tried using CLSIDFromProgID to get your clsid instead?

Steve S

pelos8-Mar-04 11:37

8-Mar-04 11:37

hello,

0.
com_error error(hr) (first, construct a _com_server)
HRESULT_FACILITY(hr) returns 4
HRESULT_SEVERITY(hr) returns 1
error.ErrorMessage() returns "Class not registered"

1.
I think so ... I get the IID and the CLSID from the _i.c file in the External Dependencies of the server project.

2. No, i haven´t. I dont know how to get the ProgID (the first parameter).
I search it in some documentation and i find something like:
hr = CLSIDFromProgID(OLESTR("Project_name.Object_name"),&pClsid);
but it does not run (error.ErrorMessage() returns "class String is not valid")

3. I ve tried to initialize as MTA instead with
CoInitializeEx(NULL, COINIT_MULTITHREADED) but i dont know what header files must i include. Is CoInitializeEx supported in Visual C++ 6.0 or is a .NET function???

A lot of thanks!!

Anonymous8-Mar-04 9:36

Anonymous

8-Mar-04 9:36

You initialized client as single threaded apartment. It won't work if you don't have message queue.
Try to initialize as MTA instead:
CoInitializeEx(NULL, COINIT_MULTITHREADED)

Edward

Class not registered

pelos9-Mar-04 20:06

9-Mar-04 20:06

Hello,

Finally, i ve used the CLSIDFromProgID function (CLSIDFromProgID(OLESTR("HelloServer.HelloObj.1"),&pClsid)) but the result is the same:
"Class not registered"

I ve sawn the windows register and i think there are all the data related with the registration:

LocalServer32 - path of the EXE server (HelloServer.exe)
ProgID - project_name.object_name.method (HelloServer.HelloObj.1)
Typelib - a String {FF638 ....)
VersionIndepentProgID - HelloServer.HelloObj

Apart from this, I ve tried to initialize as MTA instead with
CoInitializeEx(NULL, COINIT_MULTITHREADED) but the builder does not find this function and i dont know what header files must i include.

thank you very much.

Vi29-Mar-04 20:44

Vi2

9-Mar-04 20:44

Because you have made the EXE server, you cannot use the CLSCTX_INPROC_SERVER constant in calling of the CoCreateInstance. You should use the CLSCTX_LOCAL_SERVER or better CLSCTX_SERVER instead.

With best wishes,
Vita

pelos10-Mar-04 0:15