C / C++ / MFC

3-Sep-07 0:01

along with that dll, you should also have the corresponding .lib and .h.
do you have?

Re: Import dll to vc++

shakumar_223-Sep-07 0:56

shakumar_22

3-Sep-07 0:56

no
There is no .cpp ,.h file in the name of dll of file

shakumar

Re: Import dll to vc++

Hamid_RT3-Sep-07 0:05

Hamid_RT

3-Sep-07 0:05

You can use of dll with load it on your program.

Lakshmi_p2-Sep-07 23:47

Lakshmi_p

2-Sep-07 23:47

Hi all,
How can i know that the user has pressed ALT+F4 key combination .
Thanks in advance.

baerten2-Sep-07 23:53

baerten

2-Sep-07 23:53

Hi,

for example in PreTranslateMessage :

if (msg->message == WM_KEYDOWN) 
{
  if(msg->wParam == VK_F4 && GetKeyState(VK_LMENU)<0) 
  {
   //--> ALT+F4 pressed
  }

}

I hope it works Wink | ;)

Rajesh R Subramanian2-Sep-07 23:59

Rajesh R Subramanian

2-Sep-07 23:59

baerten wrote:
if(msg->wParam == VK_F4 && GetKeyState(VK_LMENU)<0)

You want it to work only if the Left Alt is pressed? I would rather suggest VK_MENU instead of VK_LMENU. Moreover, I doubt if this would ever work!

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->ßRÅhmmÃ<-·´¯`·.

Lakshmi_p3-Sep-07 0:37

Lakshmi_p

3-Sep-07 0:37

Hi,
Its working. Thanks for ur reply Smile | :)

about HKEY_CLASSES_ROOT TypeLib

Rajesh R Subramanian3-Sep-07 0:08

Rajesh R Subramanian

3-Sep-07 0:08

Handle WM_CLOSE and place the following code in it:

if(GetKeyState(VK_MENU)<0 && GetKeyState(VK_F4)<0)
{
    AfxMessageBox("Alt and F4 keys are down!");
}

[I am assuming that you're working on a dialog based app and using MFC. Do reply if there's something different]

George_George2-Sep-07 23:27

George_George

2-Sep-07 23:27

Hello everyone,

If I am developing a native unmanaged COM using Visual Studio 2005 C++, is it a mandatory to register type lib into HKEY_CLASSES_ROOT\TypeLib?

I have already registered related entries into HKEY_CLASSES_ROOT\CLSID\<co clas="" id="">, HKEY_CLASSES_ROOT\Interface\<interface id="" of="" co="" class="" exposed=""> and HKEY_CLASSES_ROOT\<co class="" name="">.

What is the function of the entry under HKEY_CLASSES_ROOT\TypeLib during COM object discovery and creation process?

thanks in advance,
George

Stack overflow while reading bamp image

Maynka2-Sep-07 23:26

Maynka

2-Sep-07 23:26

Hello all,

I am getting error message:

Unhandled exception:Stack overflow.It is due to the declaration of too large array sizes.
But how can i overcame that problem

The code presented here is given below:

FILE *fp1,*fp2,*fp_write,*fpw,*fp_col;
int width,height;
int buffer,buffer1,buffer3;
int k=0,p=0;
unsigned int blueValue=0,redValue=0,greenValue=0;
unsigned int grayValue=0;
unsigned char *pChar;
unsigned char someChar;
long int iHist[256];
float hist[256];
long int total_pixels=0;
int col[257499];
int C[561][459];
int m=0;

fp1=fopen("D:\\Pictures\\mod.bmp","rb");
if(fp1==NULL)
{
printf("file doesn't open");
return;
}

fseek(fp1,1078,SEEK_SET);

k=0;
while(!feof(fp1))
{
fread(&buffer,1,1,fp1);
col[k]=buffer;
k++;
}

int i=0;
int j=0;
k=0,m=0;
for(m=0;m<258878;m++)
{
C[i][j]=col[k];
j++;
k=k+561;
if((j%459==0) &(j!=0))
{
i=i+1;
k=i;
j=0;
}
if(i>561)
break;
m++;
}

Regards

chandu0042-Sep-07 23:48

2-Sep-07 23:48

your loop seems to exceed the array boundarys.
any way,
debug it and see.
how ever arrays of that size are not suggested.
please tell me your idea behind the algo, such that, i can suggest you something.

Russell^'2-Sep-07 23:55

Russell^'

2-Sep-07 23:55

Probally too big static variables.
take a look at this thread (yesterday)
stack vs heap[^]

Russell

Mark Salsbery3-Sep-07 9:05

Mark Salsbery

3-Sep-07 9:05

Maynka wrote:
int col[257499];
int C[561][459];

In addition to Russell's reply...

These too arrays are WAY to big for a typical stack: 2,059,992 bytes!!

You'll probably want to allocate thes on the heap Smile | :)

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

Maynka3-Sep-07 18:45

Maynka

3-Sep-07 18:45

Hi,
Thanks for your reply.How can i allocate variables on heap in VC++.

Regards,
Mayank

Picture Control / Client Rectangle

Mark Salsbery3-Sep-07 20:31

Mark Salsbery

3-Sep-07 20:31

You can use the new operator...

See this[^] thread for more info.

Mark

Mark Salsbery
Microsoft MVP - Visual C++
Java | [Coffee]

TheShihan2-Sep-07 23:22

TheShihan

2-Sep-07 23:22

Hi,

I'm currently trying to implement a pan function for panning images which are displayed in a picture control area (drawing with GDI+).

I've managed to change the mouse cursor, it should be a hand when the cursor is over the picture control and an arrow everywhere else. A part of that seems to work. I check if the mouse position is inside the area of the picture control but somehow the area "thinks" it's startpoint (upper left) is located @ x: 0 y: 0; in fact it is placed somewhere in the middle of the dialog box.

Here is the snippet:

/**************************************************************************************/
void CTrackAndTraceDlg::OnMouseMove(UINT nFlags, CPoint point)
/**************************************************************************************/
{
	HCURSOR hcur = NULL;

	CRect rc;
	m_pictureControl.GetClientRect(&rc);
	rc.NormalizeRect();

	//Get current mouse position
	POINT MousePosition = point;

	BOOL isOnPictureControl = PtInRect(&rc, MousePosition);

	if(isOnPictureControl && m_bPicLoaded && hcur == NULL)
	{
			// mouse is over the picture control AND a picture is loaded
			hcur = LoadCursor(AfxGetApp()->m_hInstance,(LPCTSTR)IDC_CUR_PAN);	
			SetCursor(hcur);
	}
	else
	{
			SetCursor(AfxGetApp()->LoadStandardCursor(IDC_ARROW));
			hcur = NULL;
	}

	CDialog::OnMouseMove(nFlags, point);
}

As you see I get the rectangle from the m_pictureControl (which is a var for the Picture Control on the dialog). But why it gives back the wrong x,y -> the rc.Width and rc.Height are correct.

Any ideas?

Thx, Shi

Re: Picture Control / Client Rectangle

chandu0042-Sep-07 23:46

Re: Picture Control / Client Rectangle

2-Sep-07 23:46

can u just put your query into different words such that, they are more cleaar to understand?

TheShihan3-Sep-07 0:02

TheShihan

3-Sep-07 0:02

in short:
- I'm using a Picture Control on my Dialog
- It's placed in the middle of the Dialog
- I'm getting the position and dimension of the Picture Control with "CRect rc;" AND "m_pictureControl.GetClientRect(&rc);"
- When I Debug I see that the position of the "rc" is TOP: 0 LEFT: 0 -> Why that, I can clearly see it's not on that Postion of the Dialog.

-> So while this gives me back the "wrong" information about the location, I cannot properly use my pan function (draging image to move it).

Hope that made it a bit clearer Smile | :)

Shi

Re: Picture Control / Client Rectangle

chandu0043-Sep-07 0:13