Sending string from COM to C# under Vista problem - COM Discussion Boards

Jerome.Mariadoss12-Dec-07 1:19

12-Dec-07 1:19

Hi,
i am trying to a add ins which can automatically create a Button inside the send item of Outlook 2007. I have used Visual Studio Tools for Office(VSTO) and created menubars, but i need button inside the send items. Could some one help me in this.
Regards,
Jerome

Re: Outlook Add ins

KarstenK12-Dec-07 2:51

KarstenK

12-Dec-07 2:51

AFAIK has the Outlook COM-API a lot of collections, so can find all objects in the right collection. You got to find the right one (first in the docs and than in your program).

Greetings from Germany

IWebBrowser2 Behavior is Different from IE7 in Vista

chunsj11-Dec-07 19:41

chunsj

11-Dec-07 19:41

Hi,

I've managed to create my own custom web browser using IWebBrowser2. Also, I managed to
configure HostUI things so that the browser uses theme. Now my final problem;

The ajax behavior is different from IE7 even if I use Vista to run my own browser application.
In IE7, when I click link which executes Javascript then "click" sound does not happen, but
my own browser like other customized browsers using IWebBrowser2 or MSHTML, makes
"click" sound and the web application's ajax behavior does not work like IE7.

How can I make my own browser's ajax behavior like IE7? I've created my browser application
using C and I can upload my code if needed.

Has anyone experienced this problem? It seems that as I said before, all other browsers which
uses IWebBrowser2 or IE's engine does show this behavior.

Thanks in advance.

Number Problem......

Peter Parker11-Dec-07 3:44

Peter Parker

11-Dec-07 3:44

I have to use more than 255 ocx im a single dialog...I am using MDS 5.0..How could I do it.

Intercept Send Mail in Outlook

_AnsHUMAN_ 10-Dec-07 21:13

_AnsHUMAN_

10-Dec-07 21:13

Hi All,
I am currently developing an Addin for Outlook 2000 and have to intercept the Send Mail event. Before sending the mail item I need to modify the Subject line to something other than original and then send the mail. I have tried DispEventAdvise but not with any success. Any pointers/suggestions are highly appreciated.

Somethings seem HARD to do, until we know how to do them.
Wink | ;-)

_AnShUmAn_

Re: Intercept Send Mail in Outlook

myshketer11-Dec-07 21:11

myshketer

11-Dec-07 21:11

What event you hook in DispEventAdvise?
Also you shure that DispEventAdvise called sucessfully?

Smart Tag Creation

anufabian9-Dec-07 22:50

anufabian

9-Dec-07 22:50

I want to create a smart tag application using the Word Document project in .Net 2.0. The problem I should be able to show the smart tag when the user types on the word doc.

Any help would be appreciated

Sending string from COM to C# under Vista problem

Stevo Z6-Dec-07 22:53

Stevo Z

6-Dec-07 22:53

Hi,

I'm experiencing and issue regarding System.AccessViolationException : Attempted to read or write protected memory that occurs since Vista. On XP's or previous, everything run fine. To be more specific. I have a C++ ATL/COM object (created in VS 6) that is wrapped in C# .NET 2.0 . Problem occurs when handling Strings.

I've created COM using standard tools in VS 6.

this is the method definition from Interface IDL file :

[id(9), helpstring("method GetString")] HRESULT GetString([out] LPSTR* word, [out, retval] int* count);

Inferface .h Header file :

STDMETHOD(GetString)(/*[out]*/ LPSTR* word, /*[out, retval]*/ int* count);

Code Inferface.c file :

STDMETHODIMP CLicenser::GetString(LPSTR* word, int *count)
{
     // helper class is some class that provides information that we need...

     *count = this->helperClass.GetCount();  // count works fine anytime.
   
     *word = this->helperClass.GetWord();  // this causes Attemped to read or write protected memory...
     // *word = "some text";  // !!! this works fine, if former line is commented out, this method throws
                                           // no Exception !!!.

     cout << "word:" << *word << endl;  // word is displayed correctly in console window (Console is created by
                                        //C# application) everytime
   
     return S_OK;
}

Method definition in C# wrapper looks like:

int IClassNameObject.GetString(out string);

Anytime this method is called, it finishes properly (also including that Console output word:[whatever word contains]), besides in Vista, it throws that System.AccessViolationException with name of that (GetString) method after it finishes.

Method is Supposed to return a count and fill a supplied string.

If u need I can create sample project / dll , I don't have one now....

zilo

Re: Sending string from COM to C# under Vista problem

Nathan Holt at EMOM7-Dec-07 7:28

Nathan Holt at EMOM

7-Dec-07 7:28

From your description, it looks like the problem is with the helperClass member. How does that work?

Nathan

Re: Sending string from COM to C# under Vista problem

Mike Dimmick7-Dec-07 16:36

Mike Dimmick

7-Dec-07 16:36

If not used in any other projects I would strongly recommend that you stick to Automation-compatible types, so here you would use a BSTR rather than LPSTR. .NET understands Automation types better than raw types.

If you can't do this, you need to ensure that the marshalling and memory model are followed correctly. You need to tell MIDL that the parameter is actually a null-terminated string (use the string attribute in addition to out) so that the data is marshalled correctly. Otherwise it assumes that the LPSTR points to a single char.

For returning a string, you must return a new buffer allocated with the system allocator, CoTaskMemAlloc. I suspect what's happening is that .NET is trying to free the returned pointer by calling CoTaskMemFree and in Windows XP, you were getting away with it.

DoEvents: Generating unexpected recursion since 1991

Re: Sending string from COM to C# under Vista problem

Stevo Z10-Dec-07 2:20

Stevo Z

10-Dec-07 2:20

Hi,

I wasn't able to replace LPSTR with BSTR. My knowledge about C++ is limited and I did not find corresponding conversion.

Anyway, I added string attribute and started using CoTaskMemAlloc on C++ side and so far it's working under Vista too, so thank you very much!

Rose | [Rose]

zilo

Sending array from C# to ActiveX component

Hampus@foi6-Dec-07 20:49

Hampus@foi

6-Dec-07 20:49

I am trying to send an array from my C# app to an ActiveX component. The array consists of floats and I have used the following declaration:

DISP_FUNCTION(MyCtrl, "SetArrayFunc", SetArrayFunc, VT_EMPTY, VTS_PR4 VTS_I2)
where SetArrayFunc looks like this:

void MyCtrl::SetArrayFunc(float *NewBuffer, short Length)

In my C# app i try the following:

ThisCtrl.SetArrayFunc(ref MyBuffer[0], (short) MyBuffer.Length);
Where of course MyBuffer is an array of floats.

However it seems as though only the first element of the array is transferred.
I have also tried using VTS_VARIANT but that did not work either.

Is there anyone here who has an idea how to solve this?

Re: Sending array from C# to ActiveX component

Nathan Holt at EMOM7-Dec-07 7:32

Nathan Holt at EMOM

7-Dec-07 7:32

I would change SetArrayFunc to take an OLE SAFEARRAY. Then you should be able to pass the array directly.

Nathan

Re: Sending array from C# to ActiveX component

Hampus@foi9-Dec-07 22:27

Hampus@foi

9-Dec-07 22:27

I'm not sure how to do that, simply replacing VTS_PR4 with SAFEARRAY gives me the following error:
"error C2275: 'SAFEARRAY' : illegal use of this type as an expression", so I guess that was not how you meant?

Re: Sending array from C# to ActiveX component

Nathan Holt at EMOM10-Dec-07 7:15

Nathan Holt at EMOM

10-Dec-07 7:15

Hampus@foi wrote:
I'm not sure how to do that, simply replacing VTS_PR4 with SAFEARRAY gives me the following error:
"error C2275: 'SAFEARRAY' : illegal use of this type as an expression", so I guess that was not how you meant?

SAFEARRAYs are fairly complicated. You'll need to read a bit of documentation on how to use them. If you don't have the info on your own computer, I think you can look it up on msdn.microsoft.com.

Nathan

Re: Sending array from C# to ActiveX component

User 2155977-Dec-07 11:52

User 215597

7-Dec-07 11:52

Create safe array of variants where variant elements will contain the floats. Let me know if this helps.

Sohail

modified 21-Apr-21 21:01pm.

Saving Powerpoint Slide as Bitmap From A Win32 sdk application(NON MFC)

niloy5-Dec-07 18:24

niloy

5-Dec-07 18:24

Hi Everybody,

I have been trying to save a powerpoint slide from a win32 sdk application.

My Requirment is like this, From my application i need to open a powerpoint application using ole and then save the slides as bitmap .But this is not possible for me to use any mfc based application or active x control.

Can anybody please help me out in this case

Thanks in advance
Niloy

Can a COM component be made that will bind to multiple columns in a DB table?

chuckles_net3-Dec-07 11:24

chuckles_net

3-Dec-07 11:24

Hi,
I want to create a phone number control. It has text boxes for a USPhone number, an international phone number and international country code. I want it to display the USPhone field and d so in a formatted manner. If the record's Country is blank or "US" or "Canada"...

I think I can create the control. Will I be able to import it into Access and use it on a form that is bound to a table, such that I can bind this control to several fields in the table?

Thanks!
Chuck

Class not registered error

Royce Fickling3-Dec-07 10:31

Royce Fickling

3-Dec-07 10:31

Hi,

I am trying to use the Visual SourceSafe 2005 SSAPI.DLL in a simple Windows application (C++), but I can't get around an error that indicates that the classes of the DLL are not registered. I have manually registered the DLL using the REGSVR32 utility, but I still get the error.

Any help greatly appreciated.

Re: Class not registered error

User 2155973-Dec-07 10:54

User 215597

3-Dec-07 10:54

Is Visual Source safe registered on your machine? If this is the case then, it is possible the construction of CoClass fails resulting CoCreateInstance returning Class not registered error.
See - http://support.microsoft.com/kb/201431

Sohail

modified 21-Apr-21 21:01pm.

Specialized OLE container Control

LLINF1-Dec-07 3:41

LLINF

1-Dec-07 3:41

I'm missing the OLE Container control from VB6 so ny question is

Is it possible to build a Com component which acts as an OLE container control for one specific COM EXE server?
It should provide a window for InPlaceActivation of the specific server, for example Microsoft Equation Editor.

Thankx in advance

Lennart

LLINF

NULL modem program

AKYap30-Nov-07 17:50

AKYap

30-Nov-07 17:50

Once I click the receive button twice, accidentally, the NULL modem program running between two PCs is hung !!

How can I detect the data is received so that I can read the data without hanging the COM program written in C# Visual Studio .Net.

Any one can help.

Thank you

yak

Fatal Error Handling

Nathan Holt at EMOM27-Nov-07 6:37

Nathan Holt at EMOM

27-Nov-07 6:37

I have a COM collection object that maintains two STL containers. While it is unlikely, it is possible that an exception will be thrown while the containers are out of sync. In a normal application, I would simply abort under those conditions. What should an in process COM server do if such a fatal error occurs?

Nathan

Re: Fatal Error Handling

User 21559727-Nov-07 7:44

User 215597

27-Nov-07 7:44

Nathan,

Usually, Exceptions in COM server shouldn't bubble up. Since it's an inproc server, aborting would terminate your client application. I don't know any solution that I have implemented but does any of the following help you device a framework -
1. Supporting ISupportErrorInfo for rich error information and your methods could fail with some HRESULT. Client is expected to take necessary action.
2. Not a good one, but if these are internal error and assuming there is no method call in progress, you could implement an event handler and notify client of this exception.

Just back from work so can't think of any more solutions Frown | :(

Let me know if this helps.

Sohail

modified 21-Apr-21 21:01pm.

Re: Fatal Error Handling

Nathan Holt at EMOM27-Nov-07 9:10

Nathan Holt at EMOM

27-Nov-07 9:10

Thanks! That's about what I thought. From what I've read, E_UNEXPECTED is intended for that sort of thing.

Nathan

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.