Re: Tried dialog hidden technique from dlgboxtricks but it didn't work.... - C / C++ / MFC Discussion Boards

Abhiman7-Jul-05 4:31

7-Jul-05 4:31

Hi,
I am working on scanner driver. The scanner sends the JPEG data in chunks and I am saving the chunks of data in a stream. I need to convert the JPEG stream to BMP stream. I want to know is there any facility from the gdi++ library to process the chunks of data and keep storing it in another stream.
Scanning the image and processing it should be paralel.

Thanks in advance.

Abhiman

Mfc42.dll

TUMB7-Jul-05 4:30

TUMB

7-Jul-05 4:30

I keep getting the following error

Cannot find import;Dll may be missing, corrupt, or wrong version file "MFC42.DLL", ordinal 6467(error 127)

Can anyone help me with this.

Meena

Re: Mfc42.dll

David Crow7-Jul-05 4:54

David Crow

7-Jul-05 4:54

What are you doing when this error appears? Does the file exist on the machine? Is there more than one occurrence?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Tried dialog hidden technique from dlgboxtricks but it didn't work....

balaclavabob7-Jul-05 4:26

balaclavabob

7-Jul-05 4:26

Hi,

I am trying to make Nishant Sivakumar - "Using global hotkeys" start hidden:
http://www.codeproject.com/system/nishhotkeys01.asp

I have added the hidden modal code from Nishant Sivakumar - "Some handy dialog box tricks, tips and workarounds ":
http://www.codeproject.com/dialog/dlgboxtricks.asp

It compiles, but it doesn't become hidden.

Changes to the "Using global hotkeys" project I made:

In "HotKeyTestDlg.cpp" I added:

void CHotKeyTestDlg::OnWindowPosChanging(WINDOWPOS * pos)
{
if(!visible)
pos->flags &= ~SWP_SHOWWINDOW;
CDialog::OnWindowPosChanging(pos);
}

and added "visible = FALSE;" to:

CHotKeyTestDlg::CHotKeyTestDlg(CWnd* pParent /*=NULL*/)
: CDialog(CHotKeyTestDlg::IDD, pParent)

In "HotKeyTestDlg.h" I added "BOOL visible;" to protected under:

class CHotKeyTestDlg : public CDialog

This wouldn't compile "error C2509: 'OnWindowPosChanging' : member function not declared in 'CHotKeyTestDlg'" till I added "void OnWindowPosChanging(WINDOWPOS * pos);" to public under:

class CHotKeyTestDlg : public CDialog

So it now compiles and runs, but it doesn't start hidden.

Re: Tried dialog hidden technique from dlgboxtricks but it didn't work....

David Crow7-Jul-05 5:03

David Crow

7-Jul-05 5:03

balaclavabob wrote:
This wouldn't compile...

You could have avoided all of this hassle by letting ClassWizard add the method for you. It would have updated both the .cpp and .h files.

balaclavabob wrote:
So it now compiles and runs, but it doesn't start hidden.

Cab you confirm that the pos->flags &= ~SWP_SHOWWINDOW statement is actually executed? If not, is visible being changed to TRUE somewhere?

Do you have any calls to ShowWindow()?

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: Tried dialog hidden technique from dlgboxtricks but it didn't work....

balaclavabob7-Jul-05 6:43

balaclavabob

7-Jul-05 6:43

DavidCrow wrote:
You could have avoided all of this hassle by letting ClassWizard add the method for you. It would have updated both the .cpp and .h files.
MFC is something I have been told to avoid at all costs and just go and learn .Net, so my knowledge of MFC is quite limited.

DavidCrow wrote:
Cab you confirm that the pos->flags &= ~SWP_SHOWWINDOW statement is actually executed? If not, is visible being changed to TRUE somewhere?
It is not executing, I tried both:

void CHotKeyTestDlg::OnWindowPosChanging(WINDOWPOS * pos)
{
if(!visible)
{
pos->flags &= ~SWP_SHOWWINDOW;
MessageBox("This executed");
}
CDialog::OnWindowPosChanging(pos);
}

void CHotKeyTestDlg::OnWindowPosChanging(WINDOWPOS * pos)
{

pos->flags &= ~SWP_SHOWWINDOW;
MessageBox("This executed");

CDialog::OnWindowPosChanging(pos);
}

both didn't bring up the message box.
visible is always false for the entire length of the program, I haven't modified it anywhere and it isn't being modified by anything.

DavidCrow wrote:
Do you have any calls to ShowWindow()?
I have no calls to ShowWindow() at all.

Re: Tried dialog hidden technique from dlgboxtricks but it didn't work....

David Crow7-Jul-05 6:51

David Crow

7-Jul-05 6:51

You failed to add ON_WM_WINDOWPOSCHANGING() to the dialog's message map. This is something that ClassWizard would have handled for you!

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: Tried dialog hidden technique from dlgboxtricks but it didn't work....

balaclavabob7-Jul-05 7:20

balaclavabob

7-Jul-05 7:20

I added it manually and it worked.

I was looking thru the ClassWizard and unless I added in ON_WM_WINDOWPOSCHANGING() manually it wouldn't have appeared....

For future reference how should I use ClassWizard todo something like this....

Thanks for your help.

Re: Tried dialog hidden technique from dlgboxtricks but it didn't work....

David Crow7-Jul-05 7:28

David Crow

7-Jul-05 7:28

balaclavabob wrote:
I was looking thru the ClassWizard and unless I added in ON_WM_WINDOWPOSCHANGING() manually it wouldn't have appeared....

Wrong again. ClassWizard has somehow been set to only show dialog-related messages. Click the Class Info tab and select Window in the Message filter: combobox. Back on the Message Maps tab, you should see WM_WINDOWPOSCHANGING in the list of messages.

"Ideas are a dime a dozen. People who put them into action are priceless." - Unknown

Re: Tried dialog hidden technique from dlgboxtricks but it didn't work....

balaclavabob7-Jul-05 7:36

balaclavabob

7-Jul-05 7:36

DavidCrow wrote:
Wrong again. ClassWizard has somehow been set to only show dialog-related messages. Click the Class Info tab and select Window in the Message filter: combobox. Back on the Message Maps tab, you should see WM_WINDOWPOSCHANGING in the list of messages.

Thanks it worked.

PNG displaying in VISUAL C - is it possible ?

seq-7-Jul-05 3:34

seq-

7-Jul-05 3:34

Im working on a Window program written in Visual C,
and I need to display a png file in a window, but
AFAIK the window GDI has no such possibility,
anyone has a clue how to do this ?

(and please dont come with an answer like: libpng.. Poke tongue | ;-P

)

Re: PNG displaying in VISUAL C - is it possible ?

Andrew Kirillov7-Jul-05 3:47

Andrew Kirillov

7-Jul-05 3:47

Hello

libpng just arised in my mind, but ...

grep2 wrote:
(and please dont come with an answer like: libpng.. )

What is the problem with it ? Why don't you like it ?

Maybe you should try GDI+ ?

Andrew

Re: PNG displaying in VISUAL C - is it possible ?

JWood7-Jul-05 8:33

JWood

7-Jul-05 8:33

If it is a Visual C++ 6.0 program you should try cximage here on CP. (Do a search)

Mail Server Project

saood swar7-Jul-05 2:29

saood swar

7-Jul-05 2:29

Hi all;
I have a Mail server project that i have to submit in 2 months and i would like to code it using VC++, and I thought if any one could provide help...:->

SS

Re: Mail Server Project

ThatsAlok7-Jul-05 2:40

ThatsAlok

7-Jul-05 2:40

saood swar wrote:
I thought if any one could provide help...

What type of help do you need ?

"Opinions are neither right nor wrong. I cannot change your opinion. I can, however, change what influences your opinion." - David Crow

cheers,
Alok Gupta

Re: Mail Server Project

saood swar7-Jul-05 3:27

saood swar

7-Jul-05 3:27

ANY KIND OF HELP; LIKE SOURCE CODES, HINTS, WEB SITES, OR EVEN SAMPLE PROJECTS..

MANY THNX..

SS

Re: Mail Server Project

Ravi Bhavnani7-Jul-05 10:36

Ravi Bhavnani

7-Jul-05 10:36

It appears you're trying to get someone to do your homework for you. You'll be doing yourself a disservice by not tackling the problem yourself.

If you're looking for ideas, here's[^] a list of open source mail systems you may want to explore.

/ravi

My new year's resolution: 2048 x 1536
Home | Articles | Freeware | Music
ravib@ravib.com

MSXML ( HELP )

Anonymous7-Jul-05 2:16

Anonymous

7-Jul-05 2:16

How Can I add this statement using MSXML in C++

Please Help me
Regards

Sorting and searching a CSV file

Sree_india7-Jul-05 0:55

Sree_india

7-Jul-05 0:55

Hi All,

I have an C++ application
The results obtained from this application are written into a CSV file.

Format of CSV file : Fixed length file with 5 fields. Key is an integer value which can be duplicated.

So for a particular key value, i can have more than one record.

Inorder to get the records for a particular key, i need to traverse the whole CSV file and get all the results.

One method that can be implemented is first sort the whole CSV file and then traverse all the records.
Is there any efficient method to do the same?

Thanks and Regards,
Sree

Re: Sorting and searching a CSV file

Christian Graus7-Jul-05 1:54

Christian Graus

7-Jul-05 1:54

I would tend to iterate through the file once, and put all the values into a multimap, using a struct for the value. Then you can look up any key you like.

Christian Graus - Microsoft MVP - C++

Call function via inline assembler

georg waechter7-Jul-05 0:49

georg waechter

7-Jul-05 0:49

Hello,

i am currently trying to call a C++ function from inline assembler code. This works fine. But I habe a problem with getting the return value of the called function.

Here my code:

float func(float h)<br />
{<br />
   std::cout << h;<br />
   return 78.0f;<br />
}<br />
<br />
int _tmain(int argc, _TCHAR* argv[])<br />
{<br />
   float par = 67.5f;<br />
   int adr = reinterpret_cast<int>(&func);<br />
   _asm<br />
   {<br />
      push par;   // Paramter pushen<br />
      call adr;   // Funktion aufrufen<br />
      add esp, 4; // Stackzeiger verschieben<br />
      mov par, eax;  // Returnwert aus eax Register in Variable<br />
   }<br />
<br />
   std::cout << par;<br />
   std::cin.get();<br />
   return 0;<br />
}<br />

Normally par should store 78.0f now. But that's not the case.
Somebody is seeing my fault?

Thanks
Georg

Re: Call function via inline assembler

Trollslayer7-Jul-05 1:24

Trollslayer

7-Jul-05 1:24

I haven't done a lot with floating point assembler but you have a push and no corresponding pop.

Elaine Rose | [Rose]

The tigress is here Big Grin | :-D

Re: Call function via inline assembler

georg waechter7-Jul-05 1:53

georg waechter

7-Jul-05 1:53

I have found the error now. The "mov" command is ok, but only for integers. If i'm using floats, i must use "fstp":

_asm<br />
	{<br />
		push par;   // Paramter pushen <br />
		call adr;   // Funktion aufrufen<br />
		add esp, 4; // Stackzeiger verschieben<br />
		fstp par;<br />
	}

Georg

Can a DLL is built by VB 6.0 use in VC 6.0?

Member 21004816-Jul-05 22:59

Member 2100481

6-Jul-05 22:59

Hello all,
I have a simple DLL is built by VB like this:
Public Function SayStatement(sSta as String) as String
SayStatement = sSta
End Function

Now I don't know how to use that DLL in VC++ environment (I meant that a message will be showed up when user click a button that used SayStatement function).

Thank you very much.
Regards,

Re: Can a DLL is built by VB 6.0 use in VC 6.0?

Michael P Butler6-Jul-05 23:34

Michael P Butler

6-Jul-05 23:34

If you mean an ActiveX DLL, then this is a COM dll. So you can use whatever your favoured C++ method for accessing COM objects.

I prefer #import as that generates a nice C++ wrapper, but you can use the old fashioned CoCreateInstance as well. Have a read on MSDN for more details.

Michael

CP Blog [^] Development Blog [^]

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