Re: Problem with VB DLL to use with VC++

Chirag Chauhan9-Jan-04 14:47

9-Jan-04 14:47

Thanks for the reply.
But as i m new to VC++, so just let me know how to tell the VC about thet VB using PASCAL convention.
and plz...review the problem again, and i think that there will be signature problem.
Anyway..i m just frustrated with this problem and want to solve this problem as early as possible, so if possible reply with VC++ code snippet.
Again thnks.

Mouse Hook Problem

Zee man9-Jan-04 9:45

Zee man

9-Jan-04 9:45

Hi All,

I am getting this weird problem for the past 4 days. Anyone seen this before?

I am trying to monitor mouse events on a specific application (Windows XP calculator calc.exe). I have set a hook on the Hwnd pointer of calc using

hook = SetWindowsHookEx(WH_GETMESSAGE,
(HOOKPROC)msghook,
hInst,
GetWindowThreadProcessId(hWnd, NULL));

and then I use the following to detect messages

static LRESULT CALLBACK msghook(UINT nCode, WPARAM wParam, LPARAM lParam)
{
char text[10];
if(nCode < 0)
{ /* pass it on */
CallNextHookEx(hook, nCode, wParam, lParam);
return 0;
} /* pass it on */
LPMSG msg = (LPMSG)lParam;
switch(msg->message)
{
case WM_LBUTTONDOWN:
case WM_NCLBUTTONDOWN:
PostMessage(hWndServer, UWM_LBUTTONDOWN, WM_LBUTTONDOWN, msg->lParam);
break;
case WM_LBUTTONUP:
case WM_NCLBUTTONUP:
PostMessage(hWndServer, UWM_LBUTTONUP, WM_LBUTTONUP, msg->lParam);
break;
case WM_MOUSEMOVE:
case WM_NCMOUSEMOVE:
PostMessage(hWndServer, UWM_MOUSEMOVE, WM_MOUSEMOVE, msg->lParam);
break;
}
return CallNextHookEx(hook, nCode, wParam, lParam);
}

What happens is that WM_LBUTTONDOWN comes in fine but the WM_LBUTTONUP never comes in, instead a mousemove message shows up (EVEN WHEN THE MOUSE IS NOT MOVING). Its very erratic. Sometimes the WM_LBUTTONUP case does execute but very rarely. Am I doing something wrong?

If I use WH_MOUSE or WH_CBT instead of WH_GETMESSAGE, none of the cases gets called. Has anyone had this kind of problem before.

By the way my mouse is not faulty. I tried this code on a number of PCs with the same result.
Thanks in advance.

Regards,
Zahid

Re: Mouse Hook Problem

Joel Lucsy12-Jan-04 4:05

Joel Lucsy

12-Jan-04 4:05

Have you tried WH_CALLWNDPROC or WH_CALLWNDPROCRET?

--
Joel Lucsy

CIntArray in a structure

(Steven Hicks)ⁿ⁺¹9-Jan-04 9:38

(Steven Hicks)ⁿ⁺¹

9-Jan-04 9:38

How can I use a CIntArray in a struct, I'm using the struct in a CArray... heres the problem .. I have a lot of items... and then it has a sub item comprising of an unknown amount of integers (thats why I don't want to us a C array, adn i can't use int)

-Steven Hicks

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Re: CIntArray in a structure

Gary R. Wheeler10-Jan-04 9:25

Gary R. Wheeler

10-Jan-04 9:25

I can't find any references in either the October 2001 or the January 2004 MSDN's to CIntArray, so I created one. I tried this:

#include "afxtempl.h"
<br>
typedef CArray<int,int&> CIntArray;
<br>
struct StructType {
    CIntArray IntArray;
};
<br>
CArray<StructType,StructType&> Array;
<br>
...
<br>
Array.SetSize(5);
Array[3].IntArray.SetSize(4);
Array[3].IntArray[2] = 10;

and it compiles and runs just fine. What's the problem you're having?

Software Zen: delete this;

How to convert CString to int

mr20039-Jan-04 9:11

mr2003

9-Jan-04 9:11

Hi,

I would like to know how to convert CString to int???

Thanks

Ehsan Behboudi

Re: How to convert CString to int

(Steven Hicks)ⁿ⁺¹9-Jan-04 9:33

(Steven Hicks)ⁿ⁺¹

9-Jan-04 9:33

inVariable=_ttoi(CStringVariable)

or

even better

sscanf(CStringVariable, "%d", intVarible

-Steven Hicks

CPA

CodeProjectAddict

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Re: How to convert CString to int

(Steven Hicks)ⁿ⁺¹9-Jan-04 9:33

(Steven Hicks)ⁿ⁺¹

9-Jan-04 9:33

inVariable=_ttoi(CStringVariable)

or

even better

sscanf(CStringVariable, "%d", intVarible);

-Steven Hicks

CPA

CodeProjectAddict

Actual Linux Penguins were harmed in the creation of this message.

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Re: How to convert CString to int

Michael Dunn9-Jan-04 17:07

Michael Dunn

9-Jan-04 17:07

See the FAQ
6.3 How can I change a number into its string representation, or vice versa?[^]

--Mike--
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Re: How to convert CString to int

Jagadeesh VN9-Jan-04 18:19

Jagadeesh VN

9-Jan-04 18:19

Hi Mike,

I presume, the code snippet below can convert a string to long, and is the most fastest method.

ConvertStringToLong( char* szFieldValue,long &lValue )
{
//Validate the string Smile | :)

int nLength = sizeof(unsigned long);
char szBuffer1[ 8 ];
char szBuffer[ 8 ];
szBuffer1[nLength] = '\0';
memset( szBuffer1,0,nLength );
szBuffer[nLength] = '\0';
memset( szBuffer,0,nLength );
memcpy((void*) (szBuffer1 + nLength - stringLength ),szFieldValue,stringLength );

for( int i=0;i

Re: How to convert CString to int

Tim Smith10-Jan-04 4:43

Tim Smith

10-Jan-04 4:43

Um, there must be a ton of stuff missing from this routine because it won't compile and I can see a few ways I can get it to crash.

Tim Smith

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

Re: How to convert CString to int

Jagadeesh VN11-Jan-04 8:42

Jagadeesh VN

11-Jan-04 8:42

I know Tim, You can crash it very easily, B'coz I haven't freed the memory, and there are a couple of other mistakes as well. But my intention was only to, break the conventional approach on converting a string to int. Its just stupid to think that, someone else will do all the jobs for U. You may have to correct the mistakes, if thr are any.

"A robust program is resistant to errors -- it either works correctly, or it does not work at all; whereas a fault tolerant program must actually recover from errors."

Window Background color

yuvald9-Jan-04 8:39

yuvald

9-Jan-04 8:39

How do I change the window background color in the OnPaint message from white to a different color ?

Re: Window Background color

Michael Dunn9-Jan-04 17:09

Michael Dunn

9-Jan-04 17:09

OnPaint() is where you draw the contents of the window, so you just create a brush of the color you want and fill the client area with that brush.
Alternatively, if you will always use the same color, create the brush first and set your window class up to use that brush for the background.

--Mike--
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Re: Window Background color

yuvald9-Jan-04 22:23

yuvald

9-Jan-04 22:23

OK,
another question:

if Im not creating a window class (using NULL) can I just somehow change the default brush for it ?

Re: Window Background color

Jijo.Raj9-Jan-04 19:06

Jijo.Raj

9-Jan-04 19:06

The Bestway to paint the background of ur window is in the WM_ERASEBKGND message.

Steps:
First map the WM_ERASEBKGND and then write the OnEraseBkgnd as follows.

<br />
BOOL CDesktopDlg::OnEraseBkgnd(CDC* pDC) <br />
{<br />
    // Getting the rect ( length and width )<br />
    // of the window.<br />
    CRect rect;<br />
    GetClientRect ( &rect );<br />
<br />
    // Creating the brush to fill the background<br />
    // of our window<br />
    CBrush brush;<br />
    brush.CreateSolidBrush ( RGB (255,0,0) );<br />
<br />
<br />
    // Filling the background of our window<br />
    pDC->FillRect ( &rect, &brush );<br />
<br />
    return TRUE;<br />
}<br />

Best Regards,
Jijo. Wink | ;)

_______________________________________________________

Yesterday is history,
Tomorrow is a mystery,
But today is a present.

Re: Window Background color

yuvald9-Jan-04 22:17

yuvald

9-Jan-04 22:17

Thanx Jijo Smile | :)

adding a C file to a CPP proj

ABean9-Jan-04 8:14

ABean

9-Jan-04 8:14

I added a C file to a CPP proj and got an error complaing about the precompiled header thing. MSDN says I should create a subproject and stick the file in that. However, I would rather not create a new sub project for a number of reasons.

As a solution, I found that I could rename the .c to .cpp and get it to compile file. Everything works but I'm wondering if there is a ticking time bomb just waiting to happen after this program goes into production.

Thanks,
Al

Re: adding a C file to a CPP proj

Maximilien9-Jan-04 8:39

Maximilien

9-Jan-04 8:39

change the compile setting for the C file to not use precompile headers.

Maximilien Lincourt
"Never underestimate the bandwidth of a station wagon filled with backup tapes." ("Computer Networks" by Andrew S Tannenbaum )

Re: adding a C file to a CPP proj

ABean9-Jan-04 13:05

ABean

9-Jan-04 13:05

Is it possible to do that for a single file in VC7? MSDN seems to indicate that the only way to do this would be to stick it in its own sub-project.

In any case I would rather not change ANY environment settings because this is for inclusion into an open source project that can be compiled on many platforms/compilers. Renaming it to CPP seems to be the easy way out. It’s just a collection of functions so I really can’t see how it would hurt. But thought it would be good to check with you guys first.

Looking for an IDE with source code!!!

Jagadeesh VN9-Jan-04 7:50

Jagadeesh VN

9-Jan-04 7:50

Hi,

I would like to have an Editor ( IDE, including source code) , with Auto-complete feature,and syntax highlighting, just like what we have in Visual Studio. If anyone has got the URLs for the same, pl. do reply.

Thanks in Advance
Jagadeesh

"A robust program is resistant to errors -- it either works correctly, or it does not work at all; whereas a fault tolerant program must actually recover from errors."

Re: Looking for an IDE with source code!!!

ABean9-Jan-04 8:08

ABean

9-Jan-04 8:08

http://www.icsharpcode.net/OpenSource/SD/

(Its for C# though...)

Re: Looking for an IDE with source code!!!

Jagadeesh VN9-Jan-04 8:16

Jagadeesh VN

9-Jan-04 8:16

Thanks for the effort ABean.

But I forgot to mention one thing, I am looking for sourec code in VC++. If you know any, pl. help me by posting the URL.

Best Regards
Jagadeesh

"A robust program is resistant to errors -- it either works correctly, or it does not work at all; whereas a fault tolerant program must actually recover from errors."

Disable Mouse clicks inside rich edit control

Anonymous9-Jan-04 7:44

Anonymous

9-Jan-04 7:44

Hi, I was curious if it was possible to disable clicks within a rich edit control without disabling the entire control. My problem is even though the user cannot type inside the control, he or she can still click inside of it. Once they do this, any new text written to the control by my app is printed in the new position clicked earlier by the user. Must I line scroll before each attempt to write to the control to prevent this problem. Or is there an easier way. Thanks.

Re: Disable Mouse clicks inside rich edit control

David Crow9-Jan-04 7:47

David Crow

9-Jan-04 7:47

Anonymous wrote:
Once they do this, any new text written to the control by my app is printed in the new position clicked earlier by the user.

Don't assume anything about the control or the cursor position within. When the control needs to be updated, set the cursor position accordingly, don't assume it's already correctly set.

A rich person is not the one who has the most, but the one that needs the least.

Use Ctrl+Left/Right to switch messages, Ctrl+Up/Down to switch threads, Ctrl+Shift+Left/Right to switch pages.

C / C++ / MFC

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