C / C++ / MFC

Re: I feel pretty stupid...

30-Jun-02 4:18

It's like everything else "Office" based upon OLE storage. Look up StgOpenStorage and go from there.

I feel pretty stupid...

Marc Richarme30-Jun-02 3:56

Marc Richarme

30-Jun-02 3:56

...but I'll have to ask anyway Smile | :)

How to I import functions from a dll that don't have name decoration?

If I do a __declspec(dllimport) void __stdcall MyFunc I get something like __imp__MyFunc@4,
if I do a extern "C" void __stdcall MyFunc I get C name decoration: _MyFunc@4

and all this results in unresolved external symbols.

The Win32 API does it by I can't get it to work... anyone plz?

Cheers,
Marc
_{Click to see my *real* signature}

Mike Nordell30-Jun-02 4:07

Re: I feel pretty stupid...

30-Jun-02 4:07

Look up stdcall (or maybe __stdcall). Basically it's PASCAL calling conventions that Win32 uses. Draw your own conclusions re. the history of Windows (though that its linker initially needed a switch to _obey_ case sensitivity rules might be a hint Smile | :)

[James Pullicino]1-Jul-02 5:21

[James Pullicino]

1-Jul-02 5:21

Look up these WinAPI functions:

LoadLibrary()
GetProcaddress()

James

Drinking In The Sun
Forgot Password?

Re: I feel pretty stupid...

Marc Richarme1-Jul-02 10:51

Marc Richarme

1-Jul-02 10:51

Originally, I intended to link to the DLL statically (at compile time), but it turned out to be slightly more tricky than I thought, so I had to fall back on a wrapper class that links to it at run-time, as you suggest it. Hmmm | :|

Cheers,
Marc
_{Click to see my *real* signature}

ADO Recordset Insert

30-Jun-02 2:04

If I do an AddNew in ADO recordset in the middle of the recordset. Where will the record appear, and will it visible to me ?

Re: ADO Recordset Insert

Giles30-Jun-02 8:45

Giles

30-Jun-02 8:45

At the end of the recordset and it will be visible. Remeber to call Update to save the data after calling AddNew and modifying the new fields, unless you have opened the recordset in a BatchUpdate mode...but I'll let you read baout that.

Have a mess around in VB on this to get a feel, or try a good (and amazingly cheap) book like SQL Sever and ADO Programming from Sybex, which covers SQL, T-SQL and ADO. A really good reference book, and covers these kinds of issues.

C++ Compiler for DOS

Dominik Reichl30-Jun-02 1:40

30-Jun-02 1:40

Does anyone know a good little C++ compiler for DOS (not Watcom)? Confused | :confused:

Mike Nordell30-Jun-02 2:00

30-Jun-02 2:00

Not Watcom you say. How about OpenWatcom (the Open Source version - though the license isn't OSI approved yeat AFAIK)?

If you don't like that idea for some reason, what about djgpp? You can't get a better deal than a GPL compiler. Smile | :)

If you drop the "little" requirement you could probably find MSVC 1.52c (and the "c" is vital) somewhere. Perhaps even MS themselves would sell you a copy.

Dominik Reichl30-Jun-02 3:21

30-Jun-02 3:21

The first sentence on the DJGPP site:

<br />
DJGPP is a complete 32-bit C/C++ development system for Intel 80386 (and higher) PCs running DOS. It includes ports of many GNU development utilities. The development tools require a 80386 or newer computer to run, as do the programs they produce. In most cases, the programs it produces can be sold commercially without license or royalties. <br />

Are you sure that DJGPP can make 16-bit DOS executables?

Dominik Reichl30-Jun-02 3:35

30-Jun-02 3:35

Ok, ok, you can Big Grin | :-D

Thanks!

Mike Nordell30-Jun-02 3:39

30-Jun-02 3:39

[snipped DJGPP "manifest"]

Are you sure that DJGPP can make 16-bit DOS executables?

No, I'm not. Coming to think of it, perhaps it "only" created 32-bit DOS executables using its own "extender"...

For a more informed answer, perhaps you should head over to this place. Even that it's Open Watcom stuff, I believe many of the participants know quite a lot about DOS programming and therefore what possible compilers are available.

I also think you should have a look at the available searchable newsgroups to see if a similar question hasn't surfaced.

Dominik Reichl30-Jun-02 3:43

30-Jun-02 3:43

The "online" compiler can make 16-bit executables so i think DJGPP can make them too...

Thanks for your help
Dominik

Alexandru Savescu30-Jun-02 22:25

Alexandru Savescu

30-Jun-02 22:25

You can use Borland C++ 3.1, the last compiler from Borland for DOS

Best regards,
Alexandru Savescu

#realJSOP1-Jul-02 5:18

#realJSOP

1-Jul-02 5:18

Or MS VC 1.52 - the last 16-bit compiler from Microslop.

"...the staggering layers of obscenity in your statement make it a work of art on so many levels." - Jason Jystad, 10/26/2001

"Half the reason people switch away from VB is to find out what actually goes on.. and then like me they find out that they weren't quite as good as they thought - they've been nannied." - Alex, 13 June 2002

Please review the Legal Disclaimer in my bio.

Bitmap question !

Hadi Rezaee29-Jun-02 21:28

Hadi Rezaee

29-Jun-02 21:28

Hi there,
I saw a program which called Chemical Lab.
In that program, programmer drew a transparent bitmap on the screen,
And then he drew a line in the bitmap ...
And then he filled the part with white color ...
How can i do that ?
I mean how could i paint the bitmap like that ?
Could explain step by step, please ?

Please see this screen shot:
http://www.geocities.com/hadi_rezaie/problems.html

Thanks.

My month article: Game programming by DirectX by Lan Mader.
Please visit in: www.geocities.com/hadi_rezaie/index.html

Hadi Rezaie

Re: Bitmap question !

Mike Nordell29-Jun-02 23:42