Re: use of TWAIN in C++ - C / C++ / MFC Discussion Boards

Hadi Rezaee5-Nov-01 4:21

5-Nov-01 4:21

Thanks for your help !
In last, BSTR = WCHAR ?

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

Hadi Rezaie

Re: COleVariant ---> char *

Joel Lucsy5-Nov-01 7:25

Joel Lucsy

5-Nov-01 7:25

I've always used V_BSTR or V_BSTRT macros.

COleVariant ov;
CString x;

ov = ...;

x = V_BSTRT( &ov );

Joel Lucsy (jjlucsy@concentric.net)

Re: COleVariant ---> char *

Hadi Rezaee6-Nov-01 4:05

Hadi Rezaee

6-Nov-01 4:05

Thanks for your help !
It was useful !
Wink | ;)

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

Hadi Rezaie

modify Icon of the MDI application

Remi Morin5-Nov-01 3:10

Remi Morin

5-Nov-01 3:10

I've modified the "IDR_MAINFRAME" and the "IDR_MYAPPTYPE" Icon but the modification are not show at run-time... I always see the MFC Icon dans the default Document one. Why?

Remi Morin
Rmorin@Operamail.com
Remi.Morin@Lyrtech.com

Re: modify Icon of the MDI application

Jon Hulatt5-Nov-01 3:20

Jon Hulatt

5-Nov-01 3:20

Each icon ID consists of two icons- a 32x32 and a small 16x16. Theres a combo box in the icon editor to select between them. Chances are you've only changed the large one, but its actually the small one that is used in most situations. Edit those and rebuild.

Sorry to dissapoint you all with my lack of a witty or poignant signature.

Re: modify Icon of the MDI application

Remi Morin5-Nov-01 4:55

Remi Morin

5-Nov-01 4:55

thanks,
yes, it was just that Smile | :)

Remi Morin
Rmorin@Operamail.com
Remi.Morin@Lyrtech.com

use of TWAIN in C++

Chambers5-Nov-01 3:03

Chambers

5-Nov-01 3:03

Hi, I`m just starting to develop some TWAIN compatibility in my program for scanners etc. but I haven't got a clue where to start, can anyone give me some good links to the information I would need to successfully implement TWAIN? I would obviously prefer somewhere that offered it for free. Big Grin | :-D

Many Thanks,
Alan.

Re: use of TWAIN in C++

C^hris L^osinger5-Nov-01 3:37

C^hris L^osinger

5-Nov-01 3:37

EZTWAIN (http://www.dosadi.com/eztwain1.htm) is free. you might give that a look.

-c

#define O 0.05
#define I(c) putchar(c)
main(){int I(int);double l[6];char lO[5];for(*(lO+1)=0;*(lO+1)<'2';I(0x0A),(*(l+5))=-25*O+((*(lO+1)
)++)*O)for((*(lO+2))=0;(*(lO+2))<'2';(*(l+4))=-40.*O+((*(lO+2))++)*O){for((*(l))=(*(l+1))=0,
*(lO)=1;++*(lO)&&(((*(l+2))=((*(l))*(*(l))))+((*(l+3))=((*(l+1))*(*(l+1))))<4.);(*(l+1))=(*(
l))*(*(l+1))+(*(l+5))+(*(l+1))*(*(l)),(*(l))=((*(l+2))-(*(l+3)))+(*(l+4)));I((*(lO)?42:0x20));}}

Re: use of TWAIN in C++

Chambers5-Nov-01 4:41

Chambers

5-Nov-01 4:41

Thanks Chris, its just what i need. I have, since asking the question, also managed to find a TWAIN wrapper on this very site, for anyone wanting an alternative.

Many Thanks Chris,
Alan. Big Grin | :-D

Re: use of TWAIN in C++

5-Nov-01 6:41

Your signature seems to be the DeCSS source, right? Big Grin | :-D

Re: use of TWAIN in C++

Chambers6-Nov-01 6:42

Chambers

6-Nov-01 6:42

Sorry, don`t know what you mean by "DeCSS source", so i`ll have to say no and let someone else claim credit. Big Grin | :-D

AEGC

Enum threads?...

5-Nov-01 2:56

If somebody could help me....
How to get count of all threads for a process in?
Or may be even more info? Like enum
Even those that are spawned by inproc com servers (ocx)
for internal use ...
Confused | :confused:

Re: Enum threads?...

Tomasz Sowinski5-Nov-01 3:31

Tomasz Sowinski

5-Nov-01 3:31

CreateToolhelp32Snapshot, Thread32First and Thread32Next if you don't have to run on NT4.

Tomasz Sowinski -- http://www.shooltz.com

Dialogs in a static linked library

andysolman5-Nov-01 2:46

andysolman

5-Nov-01 2:46

I am having problems adding a dialog to a static library.

I have created a static library with MFC support, and then went to the menu and selected insert/resource which gave me a dialog to work with. However I want to assign a class to the dialog and do things with it, but The class Wizard option is unselectable. any ideas please??

cheers

Andy

Hyperlink in a ListCtrl ????

Dan Madden5-Nov-01 2:42

Dan Madden

5-Nov-01 2:42

How would I do this?? Any pointers Confused | :confused:

Thanks in advance,

Dan

Re: Hyperlink in a ListCtrl ????

Tomasz Sowinski5-Nov-01 3:41

Tomasz Sowinski

5-Nov-01 3:41

Do you want to use all items as hyperlinks? Or only some of them?

Tomasz Sowinski -- http://www.shooltz.com

Starting app and waiting for termination

5-Nov-01 2:34

Hi
What's the easiest way to start an application and wait until it has finished?
Should I use ShellExecute or CreateProcess?
And should I use a timer to check if the app has finished or is there a better way?

regards

Re: Starting app and waiting for termination

Tomasz Sowinski5-Nov-01 3:10

Tomasz Sowinski

5-Nov-01 3:10

Use WaitForSingleObject with a handle returned by CreateProcess. ShellExecute doesn't return the handle, but you can use ShellExecuteEx.

Your thread will be stopped until the spawned process runs.

Tomasz Sowinski -- http://www.shooltz.com

Using SQL with ADO or not?

Mike Eriksson5-Nov-01 2:16

Mike Eriksson

5-Nov-01 2:16

I'm a bit confused about the use of ADO and the use of SQL. I have an application that uses a database, which database depends on the users configuration but almost always it's either MSAccess or MSSQL or Oracle SQL server. I have up till now used a sql string to create a recordset but now I'm beginning to wonder if this is the way ADO is meant to be used.

If someone would explain the pro and cons of using SQL contra 'ADO internal' I would appreciate it!

// Mike

Is this a BUG?

5-Nov-01 1:28

Is this a bug?

I tried this function overloading with Turbo C++ 3 & VC++ 6 and both produced the same error of ambigous call:

float Op (float X, float Y, float Z)
{
...
}

int Op (int X, int Y, int Z)
{
...
}

1) Op (3.0, 6.0, 9.0);
2) Op (3, 6, 9);

The compiler said that the (1) function call is ambigous despite the fact that the parameters have decimals. I tried this:

3) Op (3.1, 6.1, 9.1);

with the same result. But by specifying even the first element's type, the compiler did not complained (and called the correct function):

Op ((float) 3.0, 6.0, 9.0);

How come the compiler does not recognize the decimals of the parameter as float? Also after placing decimal values > 0 (as in the (3) function), the compiler still would not consider the parameters as float.

Is this a BUG?
Confused | :confused:

Re: Is this a BUG?

markkuk5-Nov-01 1:32

markkuk

5-Nov-01 1:32

A floating point literal (like 3.0) has the type double, not float.

ohh... So does this mean...

5-Nov-01 4:17

So does this mean that even though the other overload function's parameter is discreet (char, int, ...; non-Real), the compiler while still be confused between choosing a discreet and a real overload?

Is there a way (or rather, a numerical representation of a number) to tell the compiler to use FLOAT without TYPECASTING?

ThanXs,
Smile | :)

Re: ohh... So does this mean...

Jamie Hale5-Nov-01 6:04

Jamie Hale

5-Nov-01 6:04

Use:

function(0.3f, 0.6f, 0.9f);

This forces the compiler to look at those numbers as floats instead of doubles.

J

Re: ohh... So does this mean...

markkuk5-Nov-01 20:42

markkuk

5-Nov-01 20:42

Conversion from double to float can lose precision or overflow. So can conversion from double to int. That's why the compiler considers tham eqully bad and complains about ambiguity.

Use the suffix "f" or "F" to tell that a literal number is a float, e.g. 3.0F or 1e6f.

string, basic_string, stl and UNICODE

Michael P Butler5-Nov-01 1:23

Michael P Butler

5-Nov-01 1:23

I've been using a bit of STL here and there for the past year, but being a bit of hacker have probably been using it incorrectly.

What is the correct way of using strings so that they work for UNICODE and ANSI? What function should I use to get the data out of the string to pass it to a Windows API function?

Michael Smile | :)

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