Parsing CString - C / C++ / MFC Discussion Boards

rw10411-Mar-04 2:13

11-Mar-04 2:13

Greetings...

In VC++ 6 I want to create an activeX that contains another activeX, is this possible?

I have tried subclassing the control but I cant get the thing running?

It works if you subclass from ActiveX's that are listed in the project wizard dropdown (upon wizard project creation, step 2 I think, like BUTTON for example) but does not if you are trying to inherit from a custom activeX!!!

Cheers

Inveting a BitMap

Pazzuzu11-Mar-04 1:35

Pazzuzu

11-Mar-04 1:35

Hi Guys,

I have run into a problem for which I havent found a solution till now.Iam trying to show it here in a perspective in which Iam doing it:
I want to draw a bitmap to the screen

m_deviceContext-is the deviceContext to Which I want to draw my Bitmap.
Its mapping mode is set as MM_TWips.

CDC dcMemory;
dcMemory.CreateCompatibleDC(m_deviceContext);
CBitmap *bitmap=CBitmap::FromHandle(handle);//Handle of BitMap is passed here.
BITMAP bm;
bitmap->GetBitmap(&bm);
CBitmap* pOldBitmap = dcMemory.SelectObject(bitmap);

I draw it as follows:
xCord,-yCord,srBpWidth),srBpHeight are in Logical units.

m_deviceContext->StretchBlt(xCord,-yCord,(srBpWidth),(srBpHeight),&dcMemory,0,0 ,bm.bmWidth,bm.bmHeight,SRCCOPY);

(Figure Attached)
I get the figure but it is drawn from the co-ordinate point "up"(As a mirror Image ).I want it to drawn "Down" from the co-ordinate point or Is there any way to inverse it....

Thanks....

Re: Inveting a BitMap

Pazzuzu11-Mar-04 2:02

Pazzuzu

11-Mar-04 2:02

Solved The Problem...............

How to check that if a file has been already opened

Deepak Samuel11-Mar-04 1:35

Deepak Samuel

11-Mar-04 1:35

Hi,
I use the function ShellExecute(......) to open a file.
How to find if a file has been already opened?
Thanks,

how to call a menu by clicking a button from a dialog?

yeefarn11-Mar-04 0:57

yeefarn

11-Mar-04 0:57

hello, i'm doing a project using mfc, vc++... i'd created a dialog as my first window, i decided to create a menu as my second window, however, to link the menu to the dialog is not as easy as what i think...

if i wanna call a second dialog using the first dialong, i may use the .domodal to call it... but if i wanna call a menu, what should i do with it???

help!!!

Re: how to call a menu by clicking a button from a dialog?

Tomasz Sowinski11-Mar-04 3:01

Tomasz Sowinski

11-Mar-04 3:01

I guess it's CMenu::TrackPopupMenu you're looking for, probably with TPM_RETURNCMD flag.

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

no animal was harmed more than once during creation of this post

Re: how to call a menu by clicking a button from a dialog?

Roger Allen11-Mar-04 4:58

Roger Allen

11-Mar-04 4:58

If you want the menu options to always be available. Do something like this in your OnInitDialog()

CMenu menu;

menu.LoadMenu(ID_OF_MENU);
SetMenu(menu.m_hMenu);
menu.Detach();// now owned by dialog
DrawMenuBar();

The dialog will destroy the menu automatically when itselef is destroyed

You then just need to write ON_COMMAND() handlers for each item. If you need to enable/disable items, handle the WM_INITMENUPOPUP message and process the individual items there.

Roger Allen - Sonork 100.10016
Roger Wright: Remember to buckle up, please, and encourage your friends to do the same. It's not just about saving your life, but saving the quality of life for those you may leave behind...

Parsing CString

Caoimh11-Mar-04 0:46

Caoimh

11-Mar-04 0:46

I'v got a CString string as follows

CString strPacket = "$1234567FFFFFFFF#00

I want to parse the string so that str1 = "1234567" & str2 = "FFFFFFFF"

Any suggestions on how to do this

At the moment I'm using the following, however there must be an easier way of doing this.

m_strRspData = "";
for(i = 1; i < 9; i++){
m_strHex = m_strRspPacket.GetAt(i);
m_strRspData += m_strHex;
}
m_strRspData.MakeUpper();

Re: Parsing CString

Robert A. T. Káldy11-Mar-04 1:00

Robert A. T. Káldy

11-Mar-04 1:00

Try Tokenizer class at Codeproject.

Robert-Antonio

It's a good luck, if you meet a real fink. Then you get a respect to
normal, mid-honest people."

Re: Parsing CString

David Crow11-Mar-04 2:38

David Crow

11-Mar-04 2:38

Something like:

int x = 0;
while (isdigit(strPacket[x]))
{
    str1 += strPacket[x];
    x++;
}

str2 = strPacket.Mid(x);

However, if you are always breaking between the 8^th and 9^th characters, just use Left() and Mid().

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

TerminateProcess w2k and xp!

ceuba11-Mar-04 0:46

ceuba

11-Mar-04 0:46

VC6.0

Hello,

i have a question, how can i terminate a process from an another process? Ich my Situation i want start program b.exe from a.exe. But b.exe should start once a time! I do it with that:

1) First start b.exe:

PROCESS_INFORMATION ProcInfo;
STARTUPINFO startupInfo;
memset(&startupInfo, 0, sizeof(startupInfo));
startupInfo.cb = sizeof(startupInfo);

CreateProcess(NULL, // lpApplicationName
"C:\\b.exe", // lpCommandLine
NULL, // lpProcessAttributes
NULL, // lpThreadAttributes
NULL, // bInheritHandles
NULL, // dwCreationFlags
NULL, // lpEnvironment
NULL, // lpCurrentDirectory
&startupInfo, // lpStartupInfo
ProcInfo); // lpProcessInformation

2) Second i check, wheter program is still activ

HANDLE handle = OpenProcess(PROCESS_ALL_ACCESS,TRUE,pProcInfo->dwProcessId);

if (handle!=NULL)
{
... if programm b.exe activ terminate b.exe ...
}
else
{
... start b.exe ...
}

3) If programm b.exe active i terminate it and restart it

I do it with this code:

TerminateProcess(m_pProcInfo->hProcess, 0);

Now i got back to step 1:

This works fine in w2k, but in xp step 2 doesn't work. The handle is always not NULL.

What is wrong? Give's a better way to do that?

Thanks

Chris

Student

Re: TerminateProcess w2k and xp!

Tomasz Sowinski11-Mar-04 3:06

Tomasz Sowinski

11-Mar-04 3:06

From the top of my head: maybe instead of PROCESS_ALL_ACCESS you should use PROCESS_TERMINATE?

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

Re: TerminateProcess w2k and xp!

ceuba11-Mar-04 3:33

ceuba

11-Mar-04 3:33

Hello Tomasz,

thank you for your tip. I changed PROCESS_ALL_ACCESS to PROCESS_TERMINATE in OpenProcess(...). But i have the same effect as before.

When i alredy had terminated the programm b.exe and it doesn't exist in the tast-manager. I do step 2 and the handle is alawy not NULL. But i see this effect only in XP. W2k show me NULL and I can start b.exe with createprocess.

What do i wrong!

Thanks

Chris

ceuba@gmx.net

Student

Re: TerminateProcess w2k and xp!

Tomasz Sowinski11-Mar-04 3:46

Tomasz Sowinski

11-Mar-04 3:46

ceuba wrote:
When i alredy had terminated the programm b.exe and it doesn't exist in the tast-manager. I do step 2 and the handle is alawy not NULL. But i see this effect only in XP. W2k show me NULL and I can start b.exe with createprocess.

The process ID may be reused, so maybe you're getting the handle for other process? Anyway, since you're calling CreateProcess yourself, why don't you use another thread and WaitForSingleObject?

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

Convert CString to Unsigned Long

Caoimh11-Mar-04 0:41

Caoimh

11-Mar-04 0:41

I need to convert CString string to unsigned long. Exammple

Need CString strPacket = "FFFFF400" to unsigned long

Also any idea how to add a value to strPacket. What I mean is
strPacket = "FFFFF400" + "4" = "FFFFF404";

Re: Convert CString to Unsigned Long

toxcct11-Mar-04 0:46

toxcct

11-Mar-04 0:46

sscanf((LPCTSTR)strPacket, "%ul", &myulVar);

simple, rustik.... assuming that your string is a valid unsigned long value...

TOXCCT >>> GEII power

Re: Convert CString to Unsigned Long

David Crow11-Mar-04 2:39

David Crow

11-Mar-04 2:39

Caoimh wrote:
I need to convert CString string to unsigned long.

Use strtoul() for this.

Caoimh wrote:
Also any idea how to add a value to strPacket. What I mean is
strPacket = "FFFFF400" + "4" = "FFFFF404";

Assuming that strPacket is a CString object, this is perfectly valid:

strPacket = "FFFFF400"; // assignment
strPacket += "4";       // concatenation

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

Re: Convert CString to Unsigned Long

Steve S11-Mar-04 2:52

Steve S

11-Mar-04 2:52

(cough)
Actually, I think they meant

unsigned long x;
unsigned long y;

x = strtoul(str,NULL,16);
y = strtoul(str2, NULL,16);

strPacket.Format("%08lx", x+y);

Steve S

Re: Convert CString to Unsigned Long

Michael Haephrati12-Apr-15 9:39

Michael Haephrati

12-Apr-15 9:39

I usually use

<pre lang="c++">

_wtol(cstringvar)

- Michael Haephrati מיכאל האפרתי

must I port time critical code from Visual C++ 6.0 to 7.0 ?

GuimaSun11-Mar-04 0:30

GuimaSun

11-Mar-04 0:30

I'm thinking about porting a time-critical code from VC++6.0 to VC++7.0, did anyone make something like that and could observe peformance gains ? Probably I'll waste some time doing it...
Tx for any information Wink | ;)

GuimaSun
www.nexsun.com.br

Re: must I port time critical code from Visual C++ 6.0 to 7.0 ?

Tomasz Sowinski11-Mar-04 2:54

Tomasz Sowinski

11-Mar-04 2:54

You could theoretically get some perf boost from Whole Program Optimization introduced in 7.0. Of course, it greatly depends on specifics of your code. Did you actually profile it, anyway? Smile | :)

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

solve expression

Member 169706311-Mar-04 0:25

Member 1697063

11-Mar-04 0:25

I am getting an value like this

a+(b<<9)+(c<<17)=value

how can i recalculate a,b and c if i only have the value c is a fix value (512) and can also be obtained by
c= value>>17
how can i resolve a and b

Re: solve expression

Prakash Nadar11-Mar-04 0:38

Prakash Nadar

11-Mar-04 0:38

Mathematically not possible to solve a equation with 3 unknown and one equation.

You have to assume any three values and find the other.

MSN Messenger.
prakashnadar@msn.com

Re: solve expression

Robert A. T. Káldy11-Mar-04 0:56

Robert A. T. Káldy

11-Mar-04 0:56

<br />
a = value & 0x1FF;<br />
b = (value >> 9) & 0x1FF;<br />

where I assume, that a and b are from interval (0, 511)

Robert-Antonio

"CRAY is the only computer, which runs an endless loop in just 4 hours"

Re: solve expression

David Crow11-Mar-04 2:51

David Crow

11-Mar-04 2:51

perfect stranger wrote:
how can i recalculate a,b and c if i only have the value c is a fix value (512)...

If you already know the value of 'c', then there is no need to calculate its value. You are simply left with a problem of solving an equation with two unknowns. There are plenty of algebra/high school math sites that show how to do this.

"The pointy end goes in the other man." - Antonio Banderas (Zorro, 1998)

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