Re: Return string from vc dll - C / C++ / MFC Discussion Boards

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Re: How to draw a rounded bitmap?

Shog⁹4-Dec-02 20:27

Shog⁹

4-Dec-02 20:27

You might find these articles useful:
http://www.codeproject.com/gdi/cliprgnguide.asp[^]
http://www.codeproject.com/gdi/rgnguide.asp[^]

---

Shog⁹
Life seems pretty easy when it's from my easy chair
And you're burnin up inside and no one cares...

Re: How to draw a rounded bitmap?

Paul M Watt5-Dec-02 5:42

Paul M Watt

5-Dec-02 5:42

Thanks for the plug Smile | :)

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

Re: How to draw a rounded bitmap?

Paul M Watt5-Dec-02 5:45

Paul M Watt

5-Dec-02 5:45

Use ::CreateRoundRectRgn to create a region with rounded corners. Then call ::SelectClipRgn with your DC that you are going to paint your bitmap onto. The clipping region will prevent your bitmap from painting outside of the rounded rectangle that you create.

Shog9 has listed some articles here on CP that will help you.

Good Luck

Build a man a fire, and he will be warm for a day
Light a man on fire, and he will be warm for the rest of his life!

How to translate this (masm32 in VC++) ?

chen4-Dec-02 19:34

chen

4-Dec-02 19:34

Hi,

I need change a Dos-C program with VC++6.0. In the Dos-C program, there is a piece of 16-bit masm code like the following:

-----------------------------------------------------------
_asm {
les bx, SRB
push es
push bx
lea bx, Aspi
call DWORD PTR [bx]
add sp, 4
}

where Aspi is defined as:

void (__far *Aspi)(u_char far *) = (void __far *)0;
srbExecIo *SRB;

typedef struct {
u_char commandCode;
u_char commandStatus;
u_char hostAdapterNo;
u_char scsiRequestFlag;
u_char reserved1[ 4 ];
u_char targetId;
u_char targetLun;
u_long dataAllocLength;
u_char senseAllocLength;
u_char *dataBuffer;
u_char *srbLink;
u_char scsiCdbLength;
u_char hostAdapterStatus;
u_char targetStatus;
u_char *postRoutine;
u_char reserved2[ 34 ];
union cdbAndSense ca;
} srbExecIo;

--------------------------------------------------------------------
I'm a newer for masm32. I used wnaspi32.dll for aspi-scsi management in new VC++ code.
Would please tell me how to change above code into VC++ code ? and some related setting information?

Thanks in advance!

chen

Return string from vc dll

suresh_sathya4-Dec-02 19:06

suresh_sathya

4-Dec-02 19:06

iam writing a simple win32 dll.if i want to return the string from dll, there is a warning that warning C4172: returning address of local variable or temporary

i want to know how to return the value correctly.can anyone answer

Re: Return string from vc dll

Rickard Andersson²⁰4-Dec-02 21:05

Rickard Andersson²⁰

4-Dec-02 21:05

Even if you tell us what the warning sayas you HAVE to show us some code also!
It's impossible to help if you don't show us some code snippets!
Are you returning like:

...
return &myVaribleOrObject;

If yes:
Then I can tell that you can't return an address of a local varible from a function. Show me some code and I can help you!

Rickard Andersson@Suza Computing
C# and C++ programmer from SWEDEN!
UIN: 50302279
E-Mail: nikado@pc.nu
Speciality: I love C#, ASP.NET and C++!

Re: Return string from vc dll

suresh_sathya4-Dec-02 21:44

suresh_sathya

4-Dec-02 21:44

extern "C" LPTSTR _stdcall ReturnIEVersion()
{
HKEY hKey;
char szIEVersion[MAX_PATH];
DWORD dwType=REG_SZ, dwRetSize = MAX_PATH;
if(ERROR_SUCCESS == RegOpenKeyEx(HKEY_LOCAL_MACHINE, "Software\\Microsoft\\Internet Explorer",0, KEY_READ, &hKey))
{

DWORD dwType=REG_SZ, dwRetSize = MAX_PATH;
if (ERROR_SUCCESS == RegQueryValueEx(hKey, "Version", NULL, &dwType, LPBYTE(szIEVersion), &dwRetSize))
{
return szIEVersion;

}
else
{
return "IEVersion not found";

}
RegCloseKey(hKey);
}
else
{
return "Open Key Failed";

}

Re: Return string from vc dll

Johann Gerell4-Dec-02 22:47

Johann Gerell

4-Dec-02 22:47

Ok,

All three of szIEVersion, "IEVersion not found" and "Open Key Failed" are non-static local variables, i.e., they are declared at function scope. This means that they are not valid once the program runs out of their scope, i.e., the function returns. They are only valid inside the function.

My suggestion is that you instead pass the char array along with its max length as parameters to the function and return TRUE or FALSE if success or failure, and copy "IEVersion not found" and "Open Key Failed" where you call this function, based on the return value. Like this:

extern "C" BOOL _stdcall ReturnIEVersion(LPTSTR pszIEVersion, INT nMaxLen)
{
  HKEY hKey;
  DWORD dwType = REG_SZ;
  DWORD dwSize = nMaxLen + 1;
  LPCTSTR pszKey = _T("Software\\Microsoft\\Internet Explorer");

  if(ERROR_SUCCESS == RegOpenKeyEx(HKEY_LOCAL_MACHINE, pszKey, 0, KEY_READ, &hKey))
  {
    if(ERROR_SUCCESS == RegQueryValueEx(hKey, _T("Version"), NULL, &dwType, LPBYTE(pszIEVersion), &dwSize))
    {
      return TRUE;
    }
    else
    {
      return FALSE;
    }

    RegCloseKey(hKey);
  }
  else
  {
    return FALSE;
  }
}

How can run my VC program in a computer without VC installed?

Sstar4-Dec-02 18:59

Sstar

4-Dec-02 18:59

I have used VC++ 6.0 to developed a program. However, I found the EXE file can only run on a conputer with VC installed. However if no VC is installed on the computer, it will say "Cannot find ***.dll file", So currently what I did is to copy also the required DLL file from my PC to the target PC and place the DLL file into the same folder. It can work then...

However, I just feel it is not a neat way to solve the problem. Can anybody tell me some other better solution to build my program so as to make resultant EXE file work on PCs without VC installed also?

Thanks in Advance...

Re: How can run my VC program in a computer without VC installed?

Christian Graus4-Dec-02 19:10

Christian Graus

4-Dec-02 19:10

Yes, if you have a version higher than the standard one, you can choose to statically link to the MFC dll. Then you simply need to avoid the C run time, and you'll stand a good chance of being where you want to be, so long as you do not use Direct X, MDAC, GDI+, etc.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Re: How can run my VC program in a computer without VC installed?

Michael Dunn4-Dec-02 19:12

Michael Dunn

4-Dec-02 19:12

See the VC forum FAQ

--Mike--
"Adventure. Excitement. A Jedi craves not these things."
-- Silent Bob

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Re: How can run my VC program in a computer without VC installed?

Dov Sherman5-Dec-02 2:12

Dov Sherman

5-Dec-02 2:12

If the program was compiled in Debug mode, it will require many VC debugging DLLs to run. If you compile the program in Release mode, it will not need those DLLs.

Can we search SQL (VC++) combine with Boolean?

Anonymous4-Dec-02 18:27

Anonymous

4-Dec-02 18:27

Hi,

I am using VC6.0++ with DAO & MS Access97! So far I use SQL successfully ... well except 1 thing:

I would like search a column (define as Boolean) in a databse table that has logic Checked (true?)
Whenever I did ... it does not worked!

1) strSQL.Format ("SELECT * FROM Sample WHERE Logic = 1");
2) strSQL.Format ("SELECT * FROM Sample WHERE Logic = TRUE");
3) strSQL.Format ("SELECT * FROM Sample WHERE Logic = %d", value); // set value = 1

*) Can anyone help me on this, I appreciate any help here

Many thanks,

Anh

Re: Can we search SQL (VC++) combine with Boolean?

Nick Parker4-Dec-02 18:35

Nick Parker

4-Dec-02 18:35

Anonymous wrote:
Can anyone help me on this, I appreciate any help here

I just did something in Access XP and created a query that looks like this:

SELECT Table1.ID
FROM Table1
WHERE (((Table1.ID)=True));

There may be slight differences between 97 and XP in regards to the syntax, however I doubt this would be one of them. Hope this helps. Smile | :)

Nick Parker

Not everything that can be counted counts, and not everything that counts can be counted. - Albert Einstein

Re: Can we search SQL (VC++) combine with Boolean?

Anonymous5-Dec-02 3:41

Anonymous

5-Dec-02 3:41

Hi,

I got help to find how it works, thanks for help! Please see the the second Post of RedZenBird

Thanks,

Re: Can we search SQL (VC++) combine with Boolean?

RedZenBird4-Dec-02 18:41

RedZenBird

4-Dec-02 18:41

did you try Yes/No ? Not sure if it'll work, but I just used Access to define a test table, and it called the column type a yes/no column.....maybe that's a valuable hint. If that doesn't work...then I don't know

Just trying to keep the forces of entropy at bay

Re: Can we search SQL (VC++) combine with Boolean?

Anonymous5-Dec-02 3:41

Anonymous

5-Dec-02 3:41

Hi,

I got help to find how it works, thanks for help! Please see the the second Post of RedZenBird

Thanks,

Re: Can we search SQL (VC++) combine with Boolean?

RedZenBird4-Dec-02 19:01

RedZenBird

4-Dec-02 19:01

I've confirmed that Yes / No works. Also True / False .... Seems maybe its case sensitive (?)

Just trying to keep the forces of entropy at bay

Re: Can we search SQL (VC++) combine with Boolean?

Anonymous5-Dec-02 3:36

Anonymous

5-Dec-02 3:36

Hi RedZenBird,

Thank you very much for your help, it works great!

Many thanks,

Anh

Re: It works, thanks!

Anonymous5-Dec-02 3:37

Anonymous

5-Dec-02 3:37

Hi RedZenBird,

Thank you very much for your help, it works great!

Many thanks,

Anh

Re: Can we search SQL (VC++) combine with Boolean?

RChin4-Dec-02 23:52

RChin

4-Dec-02 23:52

I've worked with both Access and SQL Server SQL statements and found a little inconsistency in the way that both platform represents a boolean value!

However I've found that FALSE is always represented as 0 (zero), and TRUE as any non-zero value. Access will sometimes store TRUE as -1.

So to query a boolean field I use :
"SELECT * FROM [Sample] WHERE [Logic]=0" // FALSE
"SELECT * FROM [Sample] WHERE [Logic]<>0" // TRUE

Re: Can we search SQL (VC++) combine with Boolean?

Anonymous5-Dec-02 3:42

Anonymous

5-Dec-02 3:42

Hi,

I got help to find how it works, thanks for help! Please see the second Post of RedZenBird

Thanks,

An easy one for you pro's...

Brent Lamborn4-Dec-02 17:58

Brent Lamborn

4-Dec-02 17:58

My teacher says there isn't but...
There's got to be a better way to do this...

Organism aOrgArray[iColSize] = {Organism iNumChroms),Organism (iNumChroms),
Organism (iNumChroms),Organism (iNumChroms),Organism (iNumChroms),Organism (iNumChroms),
Organism (iNumChroms),Organism (iNumChroms),Organism (iNumChroms),Organism (iNumChroms),
Organism (iNumChroms),Organism (iNumChroms),Organism (iNumChroms),Organism (iNumChroms),
Organism (iNumChroms),Organism (iNumChroms),Organism (iNumChroms),Organism (iNumChroms),
Organism (iNumChroms),Organism (iNumChroms)};

iColSize = 20 for this prog

The constructor for class Organism takes an integer argument, iNumChroms, that has no default value. A default would be acceptable if it would help me clean up this ugly delcaration! What if it needed to be 1000!?

Re: An easy one for you pro's...

Christian Graus4-Dec-02 18:15

Christian Graus

4-Dec-02 18:15

You've answered your own question. Provide a default constructor, and a method to set the number of Chromosomes. Then you can set them in a loop, no matter how many there are.

Or create them on the heap. Then you can call new on them in a loop and pass in your variable.

Christian

No offense, but I don't really want to encourage the creation of another VB developer. - Larry Antram 22 Oct 2002

Hey, at least Logo had, at it's inception, a mechanical turtle. VB has always lacked even that... - Shog9 04-09-2002

Again, you can screw up a C/C++ program just as easily as a VB program. OK, maybe not as easily, but it's certainly doable. - Jamie Nordmeyer - 15-Nov-2002

Re: An easy one for you pro's...

Nick Parker4-Dec-02 18:21

Nick Parker

4-Dec-02 18:21

I suppose you could do something like:

int i;
Organism aOrgArray[iColSize];
for(i = 0; i < iColSize - 1; i++)
    aOrgArray[i] = Organism(iNumChroms);

Nick Parker

Not everything that can be counted counts, and not everything that counts can be counted. - Albert Einstein

Last Visit: 31-Dec-99 18:00 Last Update: 12-May-24 10:12

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