how to use external function in a dll from c - C / C++ / MFC Discussion Boards

Re: SDI Application

Maximilien31-Aug-09 5:09

Maximilien

31-Aug-09 5:09

You need to do what ? a text editor ? and you cannot use either CEditView or CRichEditView ?

This signature was proudly tested on animals.

Re: SDI Application

susanne131-Aug-09 23:41

susanne1

31-Aug-09 23:41

i need to print out the results of a database query, a class derived directly from CView is the only suitable possible solution till now i had before classes derived from CRichEditView and CEditView buut i hhad a lot of disadvanteges and ristrictions with them.

Re: SDI Application

Joe Woodbury31-Aug-09 9:25

Joe Woodbury

31-Aug-09 9:25

Stick an edit control in the view, occupying all of the view. (Which is, for all intents and purposes, what CEditView does, so why not use it?)

Re: SDI Application

David Crow31-Aug-09 16:12

David Crow

31-Aug-09 16:12

susanne1 wrote:
Important: I can not use the class CRichEditView instead of CView to drive the View of my application.

Why? This restriction severly limits, if not eliminates altogether, your options.

"Old age is like a bank account. You withdraw later in life what you have deposited along the way." - Unknown

"Fireproof doesn't mean the fire will never come. It means when the fire comes that you will be able to withstand it." - Michael Simmons

Re: SDI Application

Adam Roderick J31-Aug-09 20:55

Adam Roderick J

31-Aug-09 20:55

I dont think, it is good to use CView instead of CEditView or CRichEditView.
If you can derive a class from CView then you have handle SetCaretPos, SetWindowText and all to get the text support as suggested by earlier posters.

Величие не Бога может быть недооценена.

Re: SDI Application

Iain Clarke, Warrior Programmer1-Sep-09 1:25

Iain Clarke, Warrior Programmer

1-Sep-09 1:25

1/ Your question isn't really about SDI - it would be equally true from MDI too.

2/ If you're not allowed to use a Richedit control, maybe just a simple CEDitView?

3/ If you can;'t use that... then how about:
Crystal Edit - syntax coloring text editor[^]

It's not trivial to use, but I've used it for an in-program script editor with syntax colouring in the past to good effect.

Good luck!

Iain.

I have now moved to Sweden for love (awwww).
If you're in Scandinavia and want an MVP on the payroll (or happy with a remote worker), or need cotract work done, give me a job! http://cv.imcsoft.co.uk/[^]

Re: SDI Application

basementman1-Sep-09 4:27

basementman

1-Sep-09 4:27

First off, you should use CScrollView, rather than CView.

Secondly, you need to either register a custom window class with a custom cursor and override the PreCreateWindow method (preferred), or handle WM_SETCURSOR messages and call SetCursor() with the proper cursor handle, previously loaded in your init code (will flicker).

onwards and upwards...

how to use external function in a dll from c

mohant$.net31-Aug-09 2:13

mohant$.net

31-Aug-09 2:13

Hi,

how to use external function in a dll from c

For Example:I have one function(say random value generation) in C.

So the same function i want to use for my another C project using that dll.

How can i call old project function from currect project using dll.

I tried "#pragma dll(MyFile)"...

Wat i did is copy paste that dll to cureect project folder and create one header file, in that file i used #pragma dll(MyFile)->MyFile is dll name.

But it is giving complier error...Plz help me ASAP.

Thanks,
Mohan.T

Mohan t working for N.I.C

Re: how to use external function in a dll from c

David Crow31-Aug-09 2:45

David Crow

31-Aug-09 2:45

mohant$.net wrote:
But it is giving complier error...Plz help me ASAP.

The volume of your speakers is set too low so I'm unable to hear the error message. Can you please tell us what it is?

Re: how to use external function in a dll from c

mohant$.net31-Aug-09 2:54

mohant$.net

31-Aug-09 2:54

Thanks for ur replay

Below are the errors am getting:

testdll error LNK2019: unresolved external symbol _calling referenced in function _prttext
testdll fatal error LNK1120: 1 unresolved externals.

U have any other method to call the function means please forward me.....

Mohan t working for N.I.C

Re: how to use external function in a dll from c

David Crow31-Aug-09 3:26

David Crow

31-Aug-09 3:26

Have you declared _calling() after the #pragma directive?

Re: how to use external function in a dll from c

mohant$.net31-Aug-09 3:33

mohant$.net

31-Aug-09 3:33

No,

I will try that

Thanks Much

Mohan t working for N.I.C

Re: how to use external function in a dll from c

Joe Woodbury31-Aug-09 9:26

Joe Woodbury

31-Aug-09 9:26

http://msdn.microsoft.com/en-us/library/a90k134d(VS.80).aspx[^]

SCardTransmit Returns 0x0000000e.

deepakect31-Aug-09 0:34

deepakect

31-Aug-09 0:34

Hello,

i'm working on PC/SC smart card. i'm using microsoft's winscard.dll for smart card interaction. while sending a full 256 byte using SCardTransmit it is returning 0x0000000e (not enough memory). I tried to allocate memory by manually using malloc but still it's failing. Here is my code.

unsigned char photo_buff[21000];
div_t div_result;
char quo[2],rem[2];
photo_buff[0]=0xF5;
DWORD lReturn;
DWORD dwRecv;
DWORD last_block;
int size;
size=Convert_to_Hex((unsigned char *)photofinger_size_char,4);
photo_buff[1]=Hex_OP[0];
photo_buff[2]=Hex_OP[1];

last_block=(photofinger_size+3)/255;

memcpy(photo_buff+3,image,photofinger_size);
for(i=0;i<photofinger_size+3;i=i+255)
{
ZeroMemory(CmdBytes.bdata,sizeof(CmdBytes.bdata));
/*CmdBytes.bIns=0xD0;
CmdBytes.bCla=0x00;*/
send_buff_new[0]=0x00;
send_buff_new[1]=0xD0;
div_result=div(i,256);
itoa(div_result.quot,(char *)quo,16);

if(div_result.quot<16)
{
quo[1]=quo [0];
quo[0]=0x00;
}
Convert_to_Hex((unsigned char *)quo,2);
CmdBytes.bP1=Hex_OP[0];
itoa(div_result.rem,(char *)rem,16);
Convert_to_Hex((unsigned char *)rem,2);
CmdBytes.bP2=Hex_OP[0];
CmdBytes.bP3=0xFF;
memcpy(CmdBytes.bdata,photo_buff+i,255);
lReturn = SCardTransmit(hCardHandle,
SCARD_PCI_T0,
(PUCHAR)&CmdBytes,
256+5,
NULL,
pbRecv,
&dwRecv ); //lReturn returns 0x0000000e
}

return 1;
}

If anybody came across this problem please help me.

-----
deepakect

Inheriting Struct

kumar sanghvi31-Aug-09 0:34

kumar sanghvi

31-Aug-09 0:34

Hi,
Please let me know whether the below code right or wrong..

#include<iostream>
using namespace std;

struct a
{
int ty;
float d;
};

class A:public a
{
int b;
float se;
}

Re: Inheriting Struct

Rajesh R Subramanian31-Aug-09 0:42

Rajesh R Subramanian

31-Aug-09 0:42

kumar sanghvi wrote:
class A:public a
{
int b;
float se;
}

You're missing the terminating ; at the end of the class body. (plenty of nitpicks here - they'll point out that I missed this error).

Other than that, it's looking syntactically correct.

It is a crappy thing, but it's life -^ Carlo Pallini

Re: Inheriting Struct

Richard MacCutchan31-Aug-09 3:32

Richard MacCutchan

31-Aug-09 3:32

Did you try compiling it?

Problem with Visual studio 2008 feature pack's CMFCToolBar - not being displayed

Sternocera30-Aug-09 23:53

Sternocera

30-Aug-09 23:53

Hello,

I'm upgrading my MFC application to make use of some of the new user interface elements from the Visual studio 2008 feature pack. My first concern is upgrading my CToolBar to the pack's new CMFCToolBar, to use large icons, rollover buttons, etc.

I use much the same boilerplate code in CMainFrame::OnCreate() as ever:

if (CFrameWnd::OnCreate(lpCreateStruct) == -1)
	return -1;

// I've attempted to simplify the code to the greatest possible extent to isolate the problem:
	
// The this pointer points to CMainFrame class which extends the CFrameWnd class.
if (!m_wndToolBar.CreateEx (this, TBSTYLE_TRANSPARENT) ||
    !m_wndToolBar.LoadToolBar (IDR_MAINFRAME))
{
    TRACE0("Failed to create toolbar\n");
    return -1;      // fail to create
}

However, no toolbar is visible when the application starts - it is simply omitted. Switching the class of m_wndToolBar from CMFCToolBar back to CToolBar once again makes the toolbar visible.

Why might the framework fail to display my CMFCToolBar? How can I fix the problem?

Regards,
Sternocera

Re: Problem with Visual studio 2008 feature pack's CMFCToolBar - not being displayed

Prasann Mayekar31-Aug-09 2:37

Prasann Mayekar

31-Aug-09 2:37

this new feature pack stores the settings under the registry, so delete the workspace registry key under ur app key and try. alternatively in initinstance() u can call cleanState().

if this doesnt work then try creating a new sample toolbar and check if it works.

enjoy

Pras

Shadow

thanhvinh090630-Aug-09 23:36

thanhvinh0906

30-Aug-09 23:36

Is MFC have any function that support draw shadow for rectangle, elipse, or round rectangle?

Re: Shadow

Cedric Moonen30-Aug-09 23:45

Cedric Moonen

30-Aug-09 23:45

Not as far as I know but you can easily draw it your self: simply draw your shadow first by selecting a gray brush and drawing your shape with a certain offset (x and y). Then draw your original shape.

Cédric Moonen
Software developer

Charting control [v2.0]
OpenGL game tutorial in C++

Re: Shadow

thanhvinh090631-Aug-09 2:41

thanhvinh0906

31-Aug-09 2:41

So, How to fade it?? Could you give me an example?

Re: Shadow

Nuri Ismail31-Aug-09 3:28

Nuri Ismail

31-Aug-09 3:28

The MFC Feature Pack for Visual C++ 2008 [^] provides CDrawingManager class [^]. If you are using VS 2008 and MFC Feature Pack you can use DrawShadow method of CDrawingManager [^].

Regards,
Nuri Ismail

Re: Shadow

thanhvinh090631-Aug-09 5:40

thanhvinh0906

31-Aug-09 5:40

I can't find any information about CDrawingManager in MSDN document.

Re: Shadow

Nuri Ismail31-Aug-09 6:04

Nuri Ismail

31-Aug-09 6:04

I've gave the links in my previous post, but i will paste them again:

1) CDrawingManager class -> here[^]
2) CDrawingManager::DrawShadow method -> here[^]

But remember that this class is a part of MFC Feature Pack for Visual C++ 2008. It will draw only rectangular shadows. If you are not using the MFC Feture Pack, you can download it from here[^].

Alternatively you can use CExtWndShadow class from this[^] article to draw rectangular shadows.

Both classes draw nice shadows, try them. Smile | :)

Regards,
Nuri Ismail

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