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Re: VC++ Template problem

Christian Graus5-Dec-02 7:25

Christian Graus

5-Dec-02 7:25

Oh, I thought you were trying to do a swap. This is an add, and I'm not sure it has any value over simply adding without the function call. It will not compile if the type in question does not have an operator +. Because your return type is 'int' it also will not compile unless the template argument is a number, and it will give warnings because it will strip floating point numbers down to an int.

Swap would look like this ( except you'd add the template arguments being stripped by the site because neither of us checked 'show message as-is' )

template
void Temp1(X &A, X &B)
{
X Var;
Var = A;
B = A;
A = Var;
}

Christian

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

C# will attract all comers, where VB is for IT Journalists and managers - Michael P Butler 05-12-2002

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

Frame Control

jmgir4-Dec-02 22:50

jmgir

4-Dec-02 22:50

I was interested in using the "Microsoft Forms 2.0 Frame Control" but this control can't be used outside of VB (If you try it, the "GetObject" method gives you an useless dispatch)so anybody has a similar control or knows how to make it?

Thanks in advance Confused | :confused:

How to put my working application's icon in the notification area?

julych4-Dec-02 22:26

julych

4-Dec-02 22:26

I need help - how to put my working application's icon in the taskbar notification area (the system tray) instead of its default position in the taskbar when minimized? Shall I change some registry key or…?

Re: How to put my working application's icon in the notification area?

viliam4-Dec-02 23:52

viliam

4-Dec-02 23:52

There are some samples like:
http://www.codeguru.com/shell/systemtray.shtml

If aplication's window is visible and you don't want
to see it in a bar next to Start button, you have to
hide its parent window (if here is any).
Anyway if you need just put icon to system tray
you can find inspiration in sample above.

viliam

Visual C++ 7 and Windows'98

julych4-Dec-02 22:24

julych

4-Dec-02 22:24

Please tell me is it possible to build applications under Visual C++ 7.0 and to work under Windows 98. I tried in Property Pages/Configuration Properties/Linker to set optimization for Windows 98 but no result! What shall I change?

Re: Visual C++ 7 and Windows'98

Christian Graus4-Dec-02 22:54

Christian Graus

4-Dec-02 22:54

Yes, it is.

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: Visual C++ 7 and Windows'98

Tim Smith5-Dec-02 2:10

Tim Smith

5-Dec-02 2:10

You don't even need to enable optimizations for Windows 98 to run programs built with VC7 on 98.

Try to figure out what bugs in your code are causing the program not to work with 98.

Tim Smith

I'm going to patent thought. I have yet to see any prior art.

CDatabase Open

MFC is the Best4-Dec-02 21:42

MFC is the Best

4-Dec-02 21:42

hello @all,

i connected my mfc program and an access database with ODBC.

<br />
CDatabase db;<br />
db.Open(_T( "MyDatabase" ), FALSE,<br />
FALSE, _T( "ODBC"));

the ODBC driver of my database is called 'MyDatabase'. but when i use this code, the database is not selected. i must select it myself!
what must i change to select my odbc driver from the program (i have to do nothing, after i start the program)?

thanks
mfc

Re: CDatabase Open

Michael P Butler4-Dec-02 22:55

Michael P Butler

4-Dec-02 22:55

Is there a reason you are using ODBC and not ADO or even DAO?

You'd probably find ADO more friendly and there are plenty of good classes on CP to make it even easier.

Michael

Fat bottomed girls
You make the rockin' world go round -- Queen

Re: CDatabase Open

MFC is the Best4-Dec-02 23:41

MFC is the Best

4-Dec-02 23:41

i ever use ODBC (i know, that is no argument Big Grin | :-D

), i think it is better. but i found my mistake. i forgot:

db.Open(_T( "MyDatabase" ),false, false, "ODBC;UID=sa");

thanks for your reply. Rose | [Rose]

mfc

Passing handle to other classes...

p833704-Dec-02 21:23

p83370

4-Dec-02 21:23

I created an application with MS Visual C++ 6.0. By doing this the MS Visual C++ studio created some code that uses variables (theApp, m_pMainWnd, m_wndView, m_wndStatusBar). The next thing I did, was creating my own classes (e.g. class CMyClass located in other modules). These classes are not directly related to the WIndows GUI, put perform some kind of I/O.

Now, I want to put the received data in the Client Window of my application (m_wndView) and even put some text on the status bar (m_wndStatusBar). I want to do this from inside my own class CMyClass. I believe I need the correct CWnd handle to do this. So what I'm looking for is a proper method to pass the correct handle to my CMyClass (e.g. in the constructor) and then use this hande inside my class.

Which handle do I need to pass (m_pMainWnd,...) and how do I use this handle to invoke the correct member (e.g. for setting text in the statusbar with the meber SetPaneText)?

Can I find somewhere an example.

P.S.: If you've not noticed by now, I'm a novice.

Thanks !

SendInput problem

Cyberizen4-Dec-02 21:17

Cyberizen

4-Dec-02 21:17

HI
Well this SendInput function is giving Mad | :mad:

me a lot of problems i cannot declare KEYBDINPUT and INPUT types VC++ gives me error saying "Undeclared Identifier" i have include "winuser.h" as well as "wndows.h" even checked on the library settings "user32.lib" but no luck still giving me the error i know the syntax but i find myself in a helpless situation please help me out here i even tried this
::KEYBDINPUT but it still gives me error concerning the namespace i dont know wat to do please help me out and yes i am working on windows xp and using visual C++ ver 6.0 i hope these are enuff clues to help u guys figure out the problem

THANKS IN ADVANCE

Re: SendInput problem

RicoH5-Dec-02 1:12

RicoH

5-Dec-02 1:12

You don't need to include 'winuser.h' since it is already included in 'windows.h'.
The only thing you need to do is add the following line of code BEFORE you include 'windows.h'.

So your code should like this:

<br />
#define _WIN32_WINNT 0x0500<br />
<br />
#include <windows.h><br />

Hope this gets you along...

RicoH

Don't think you are, know you are...

Subclassing of floating Toolbar's parent

CEx4-Dec-02 20:52

CEx

4-Dec-02 20:52

Objective : Want to Paint Toolbar's parent when toolbar is in floating state.

Idea : Subclass the Toolbars parent when its in floating state, and handle WM_PAINT/WM_NCPAINT message to do the required drawing .

Problem : I am not able to understand the concept of subclassing Frown | :(

How to subclass ??

following is the code snippet which may help :

<br />
void CMyTB::OnWindowPosChanged(WINDOWPOS FAR* lpwndpos) <br />
{<br />
	CToolBar::OnWindowPosChanged(lpwndpos);<br />
	<br />
	if( IsFloating() )<br />
	{<br />
		if( m_pDockBar && !m_bDone )<br />
		{<br />
			CWnd* pParent = m_pDockBar->GetParent();<br />
			if( pParent->IsKindOf(RUNTIME_CLASS(CMiniFrameWnd)))<br />
			{<br />
                           // Write some Code here to Route pParent's Painting message, so that its painting can be done outside this window. How do I do this , is subclassing a solution ???<br />
				<br />
			}<br />
		}<br />
	}<br />
	else if( m_bDone ) {<br />
		m_bDone = FALSE;<br />
	}	<br />
}<br />

Help Gurus !!

Abhishek Narula

How can it draw Menu?

litth4-Dec-02 20:14

litth

4-Dec-02 20:14

"WindowBlinds" never use ModifyMenu or SetMenuItemInfo
and Menu is not with MF_OWERDRAW style. Window never receive WM_DRAWITEM or WM_MEASUREITEM Message.

How can it draw Menu?

How to draw a rounded bitmap?

phped4-Dec-02 20:11

phped

4-Dec-02 20:11

Hi there,How can I draw a rounded bitmap? Thanks a lot!

Re: How to draw a rounded bitmap?

Christian Graus4-Dec-02 20:18

Christian Graus

4-Dec-02 20:18

You may be able to set a region. Otherwise you can use masking, just like any bitmap which is being drawn transparently with a colour key. I believe TransparentBlt works this way. You'll need W98 or later, and the Platform SDK.

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 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;
  }
}

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