Re: GDI+ AlphaBlending - C / C++ / MFC Discussion Boards

Re: LPTSTR type

23-Feb-02 8:24

Thks a lot!

The code now works perfectly. My variable Description was not large enough Blush | :O

... Here the changes:

Lenght=lstrlen(TypeRes)+lstrlen(Resource);
Description = (char*) malloc(Lenght);
Description[Lenght]='\0';
wsprintf (Description, "<%s : %s>", TypeRes, Resource);

Appstmd

Re: LPTSTR type

Michael Dunn23-Feb-02 11:36

Michael Dunn

23-Feb-02 11:36

The code is still wrong, you don't allocate enough space for the Description string. Look at the wsprintf() format - you have the two substrings, two angle brackets, two spaces, and a colon. Plus the terminating null. So you should malloc (lstrlen(TypeRes) + lstrlen(Resource) + 6)*sizeof(TCHAR)

--Mike--
Fetchez la vache!
My really out-of-date homepage
Sonork - 100.10414 AcidHelm
Big fan of Alyson Hannigan and Jamie Salé.

Re: LPTSTR type

Felix Cho23-Feb-02 7:24

Felix Cho

23-Feb-02 7:24

You should:

use the TEXT() or _T() macros for all your string literals
use TCHAR instead of char
include tchar.h
and if you have UNICODE and _UNICODE defined (ie you are using unicode version of wsprintf), make sure you check the "Display unicode strings" options under the Debug tab of the VC++'s Options dialog.

PS. Are you sure you have a valid buffer in Description?
PPS. Just saw you assigning Description from the results of wsprintf. Did you read the docs at all? LPTSTR is not a string class Mad | :mad:

! You are making the Description pointer to point to some invalid address after the function call.

Re: LPTSTR type

Michael Dunn23-Feb-02 7:57

Michael Dunn

23-Feb-02 7:57

Assuming the calling code is passing a valid buffer in the Description parameter, take out the "Description =" part and it will work. Then do all the TCHAR-related stuff the other posts have mentioned (although they are wrong about Unicode; wsprintf() is not a Unicode-only function, that would be swprintf()).

--Mike--
Fetchez la vache!
My really out-of-date homepage
Sonork - 100.10414 AcidHelm
Big fan of Alyson Hannigan and Jamie Salé.

Do anyone know where can we get some information about CD's file struct?

MeteOS323-Feb-02 1:55

MeteOS3

23-Feb-02 1:55

Hahaha... I am Alpha Intelligence(AI). And I'm a chinese boy.

I want to write a software like "Clone CD"?
So I want to know about CD's files structs. But you see, I don't know how can I get it. And Where I can get it.

Thanks a lot! Blush | :O

I want to become programmer!!!

Re: Do anyone know where can we get some information about CD's file struct?

markkuk24-Feb-02 21:40

markkuk

24-Feb-02 21:40

CloneCD does a raw copy of the CD, it completely ignores any file structure (or differences between CD-DA and CD-ROM). If you decide that you don't want to do another CloneCD after all, the file system on CD-ROMs is defined in the standard ISO 9660. A draft version is viewable here There are various extensions to handle long file names, bootable discs, etc. See www.cdrfaq.org for more information.

GDI+ AlphaBlending

AJ12323-Feb-02 1:55

AJ123

23-Feb-02 1:55

Hi,

I am fairly new to anything involving graphics! But been playing around GDI+

What i want is to merge two images, using transparency. Can someone give me an overview of doing this in GDI+ using alphablending.

Cheers
Rich

Re: GDI+ AlphaBlending

Christian Graus23-Feb-02 10:46

Christian Graus

23-Feb-02 10:46

I'm not sure if you can select a bitmap and specify transparency when you draw it. I seem to recall I did it using direct pixel access ( GetBitmapData, from memory is how to do that ), and then merging the pixels myself.

Christian

The tragedy of cyberspace - that so much can travel so far, and yet mean so little.

About creat my DLL file ?

MeteOS323-Feb-02 1:49

MeteOS3

23-Feb-02 1:49

Hi,everybody here. I'm very sorry I am a Chinese boy. So I have poor English level to understand the means in this wonderful websuit. But I like this web very much.

But now, I have some difficult in creating my DLL files. The question is: Could I create DLL file with Borland Turbo C (version:2.0)? And can I use Visual C++ to write C code? Haha... I have more question about C/C++,do I? Haha... There is another question that can I use Visual C++ to create my DLL files and use it in the Visual C++?

Thanks a lot!!
Blush | :O

I want to become programmer!!!

Re: About creat my DLL file ?

Mazdak23-Feb-02 1:59

Mazdak

23-Feb-02 1:59

Do you use ATL or MFC? Smile | :)

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

Re: About creat my DLL file ?

MeteOS323-Feb-02 1:59

MeteOS3

23-Feb-02 1:59

Sorry, I am a new one.
Now, I have learned Visual Basic 6 by myself. And I have learned C.
I want to use Visual C++/C# in furture. So I should learn them verg good new!

Thanks Blush | :O

I want to become programmer!!!

Re: About creat my DLL file ?

Mazdak23-Feb-02 2:29

Mazdak

23-Feb-02 2:29

So if you are beginner put your email here,then I'll send you some document to write dll with MFC and use it.

Also this is very good book

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

Re: About creat my DLL file ?

MeteOS328-Feb-02 0:00

MeteOS3

28-Feb-02 0:00

Hi, my good friend. Thanks for replying my question. And you know I am a beginner. So I don't know how can I improve my programme level. You know, in china, computer is not populer.
And the computer is very expensive in China. So Chinese software is do not famous in the world. So can you tell me what can do improve my programme skill? And what kinds of books I should read?

OK! finally, Thanks a lot.
And this is my E-mail address: alpha_8848_prince@hotmail.com

Blush | :O

I want to become programmer!!!

Re: About creat my DLL file ?

Mazdak28-Feb-02 3:08

Mazdak

28-Feb-02 3:08

Hi:

Its good to begin from some online books,I wanted to email them to you but all of them become
too large,so I put their link here and you can download them.You can read one or two of them,then
begin to practice,and here,codeproject,is best place to solve your problems,and also find
lots of tips,sample code and ...You can read them and use them in your programs,and then
you will improve step by step.
My suggestion is after reading one of these books,focus on one field,for example database or user interface or ATL.
Here are the links:

http://http://pcbook.51soft.com/ebooks/english.asp

http://www.amazon.com/exec/obidos/ASIN/0672313502/qid=990742038/sr=1-4/ref=sc_b_4/104-1480260-9675169

http://cplus.h1.ru/cplus/tus/ind.htm

http://tikitak.narod.ru/using/index.htm

http://www.webgeordie.co.uk/visualcpp/database/home.htm

If you need any other helps you are welcome Smile | :)

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

Re: About creat my DLL file ?

MeteOS35-Mar-02 18:13

MeteOS3

5-Mar-02 18:13

Hi, thanks a lot. My good friend.

The words below were have nothing about my question...

Wonderful Programme. Programme is art. How do think about it?

Here, i wanna know how foreigner think about Chinese software. Is there any Chinese software in U.K's or U.S.A's market? (C:

Big Grin | :-D

I want to become programmer!!!

Re: About creat my DLL file ?

Mazdak6-Mar-02 0:24

Mazdak

6-Mar-02 0:24

Alpha Intelligence wrote:
Wonderful Programme. Programme is art.

I completly agree with you Big Grin | :-D

I love programming too,specially programming with VC. Smile | :)

That's a wonderful world,there is nothing and you have some limited tools,then you have to create something new Smile | :)

Alpha Intelligence wrote:
Here, i wanna know how foreigner think about Chinese software. Is there any Chinese software in U.K's or U.S.A's market?

Sorry,I live in Iran and I'm not aware of U.K or U.S.A,and I haven't seen any Chinese program in my country,maybe there are some,but I don't know if they are from China or not. Smile | :)

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

Re: About creat my DLL file ?

MeteOS39-Mar-02 23:04

MeteOS3

9-Mar-02 23:04

Oh, I see. I think I should improve my programme level at once. I love my motherland. So I think I can Change the world! (c:
Big Grin | :-D

I want to become programmer!!!

Re: About creat my DLL file ?

Paul M Watt23-Feb-02 10:56

Paul M Watt

23-Feb-02 10:56

Alpha Intelligence wrote:
And can I use Visual C++ to write C code

Simply name your file with a .c extension rather than .cpp, and DevStudio will use a C compiler in order to compile that file. You will need to be careful if you are trying to mix C compiled code with C++ compiled code however, because the C++ compiler will mangle the linker symbols in order to make function overloading possible.

Hex String to Decimal long

soup23-Feb-02 1:47

soup

23-Feb-02 1:47

Hi,

This must be really simple, but I am struggling with this. If I have a string such as:

TCHAR hex[] = "0AF79E00";

How can I convert this into a long variable so I know it means:

184,000,000

Is this possible? Confused | :confused:

Thanks in advance,

Simon

Re: Hex String to Decimal long

Mazdak23-Feb-02 1:56

Mazdak

23-Feb-02 1:56

There are some articles in CP about it.
Check this and this

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

Re: Hex String to Decimal long

Chris Hafey23-Feb-02 7:50

Chris Hafey

23-Feb-02 7:50

use sscanf:

TCHAR hex[] = "0x0AF79E00";
int value;
sscanf(hex, "%X", &value);

Chris Hafey

Re: Hex String to Decimal long

soup23-Feb-02 14:11

soup

23-Feb-02 14:11

Cheers for the help guys. Smile | :)

I'm now back on track. Cool | :cool:

Simon

How create a pie or chord region

wangyiming22-Feb-02 23:50

wangyiming

22-Feb-02 23:50

I don't know how create a custom region!

thanks a lot!

Re: How create a pie or chord region

Paul M Watt23-Feb-02 10:03

Paul M Watt

23-Feb-02 10:03

You can call BeginPath on a DC, Then you could call your pie or chord function, and then End the path with EndPath, the path is stored inside of the region. Then you can call PathToRegion on that DC and a new region will be created with that path.

nothing appear!

Mazdak22-Feb-02 23:04

Mazdak

22-Feb-02 23:04

What's wrong with these code?Nothing appear in the screen!!!

void CMysView::OnPaint()
{
	CPaintDC dc(this); // device context for painting
	paintrect()

}

int CMyView::paintrect()
{
	CPaintDC dc(this);

	RECT rctA;
	rctA.left = 20;  
	rctA.top = 30;  
	rctA.right  = 180;  
	rctA.bottom = 230;


	dc.Rectangle(&rctA);

	return 0;
}

Mazy

"So,so you think you can tell,
Heaven from Hell,
Blue skies from pain,...
How I wish,how I wish you were here."
Wish You Were Here-Pink Floyd-1975

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