Solved

How to use Excel COM interface in VC ???

Posted on 2000-05-09
4
862 Views
Last Modified: 2013-11-20
Hi,

I have been able to get (using OLEView) the stub files for the COM
interface to Excel (XL5EN32.c and XL5EN32.h/idl)... So far so good :)

But which of the hundreds of CLSID do I use to instanciate an object?
And which objects to instanciate???

Here's what I want to do:
Open an XL sheet in a C++ application (MFC);
Read some cells;
Write to some cells;
save the sheet.

All this is simple in VB once you get a starting object...
But how to do it in VC??? Any hints? Any doc anywhere online?
I guess this code is close:
HRESULT hr;
hr = CoInitialize(0);
Application *w; // is this the right starting object???
hr = CoCreateInstance( CLSID__ExcelApplication, NULL,
        CLSCTX_INPROC_SERVER, DIID_Application, (void**) &w);

is it the right CLSID and IDD???

any hints on how to use this interface in VC will be welcomed :)

Thanks
0
Comment
Question by:aquila98
  • 2
4 Comments
 
LVL 4

Expert Comment

by:mandhjo
ID: 2793986
If you've already got working VB code, find the corresponding objects in the header files you have and find their corresponding CLSIDs.  The names of the classes used in VB will be the same as in the header files.

Am I missing something?
0
 
LVL 1

Accepted Solution

by:
hasmet earned 200 total points
ID: 2794378
First you #import the typelibs
#import <C:\Program Files\Microsoft Office\Office\mso9.dll>
#import <C:\Program Files\Common Files\Microsoft Shared\VBA\VBA6\VBE6EXT.OLB>
#import <C:\Program Files\Microsoft Office\Office\excel9.olb> rename("DialogBox", "DialogBoxXL") rename("RGB", "RGB_XL") named_guids

put the correct path!!!
now

declare your Application pointer

      Excel::_ApplicationPtr m_pAppExcel;

then
forexample

      HRESULT hr;
      hr = m_pAppExcel.CreateInstance(__uuidof(Excel::Application));
            _bstr_t bstrTitle("my excel");
      m_pAppExcel->PutCaption(bstrTitle);
            Excel::_WorkbookPtr pDum = m_pAppExcel->GetWorkbooks()->Add();
m_pAppExcel->PutVisible(VARIANT_TRUE);


If you have VC++ 6, intellisense
will work just as in VBA. AND if you have VBA code, then it is almost identical to convert like this.
0
 
LVL 2

Author Comment

by:aquila98
ID: 2795922
Very nice! Thanks ;-)
That's what was missing I guess... The #inport :)

Except, I got these errors for the excel9 file:
excel9.tlh(10494) : warning C4003: not enough actual parameters for macro 'DialogBoxA'
excel9.tlh(10494) : error C2059: syntax error : ',
....

It's complaining about this DialogBoxA is there
any more rename I should do?

I am close to a solution, thanks for your help
0
 
LVL 2

Author Comment

by:aquila98
ID: 2796183
Silly me!

I remembered the rename MUST be on the same line
as the import for it to work ;-)

Thanks for your help
0

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
How to calculate times for developing software? 8 65
not able to insert into temp table 68 157
SQUD PROXY SERVER, UNIX, SLL/HTTPS 5 77
Problem to App 4 39
Introduction: Dynamic window placements and drawing on a form, simple usage of windows registry as a storage place for information. Continuing from the first article about sudoku.  There we have designed the application and put a lot of user int…
Introduction: Ownerdraw of the grid button.  A singleton class implentation and usage. Continuing from the fifth article about sudoku.   Open the project in visual studio. Go to the class view – CGridButton should be visible as a class.  R…
This video will show you how to get GIT to work in Eclipse.   It will walk you through how to install the EGit plugin in eclipse and how to checkout an existing repository.
This Micro Tutorial demonstrates using Microsoft Excel pivot tables, how to reverse engineer competitors' marketing strategies through backlinks.

863 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

26 Experts available now in Live!

Get 1:1 Help Now