C / C++ / MFC Discussion Boards

Printing a screen shot using VC++/MFC

jasmine_12312-May-08 19:07

jasmine_123

12-May-08 19:07

on a single click how do i take a snapshot and print of currently displayed screen using VC++/MFC

Re: Printing a screen shot using VC++/MFC

Naveen12-May-08 19:13

Naveen

12-May-08 19:13

There are lot of articles in the code project about capturing screen. Why dont you have a search?

nave

[OpenedFileFinder]

Re: Printing a screen shot using VC++/MFC

Hamid_RT12-May-08 19:22

Hamid_RT

12-May-08 19:22

See http://www.codeproject.com/KB/GDI/barry_s_screen_capture.aspx[^].

Re: Printing a screen shot using VC++/MFC

David Crow13-May-08 3:08

David Crow

13-May-08 3:08

See here.

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Compilation error while including a headerfile of MFC application into a Win32 lib

V K 212-May-08 18:56

V K 2

12-May-08 18:56

Hi,

I have a MFC class which is derived from CWinApp. It has got two methods set and get. I have to use this set method in a Win32 lib. But when I include the header file of above MFC application. I am getting a compilation error like

C1189: #error : WINDOWS.H already included. MFC apps must not #include <windows.h> . Can I know how to solve this problem.

Thanks & Regards

Re: Compilation error while including a headerfile of MFC application into a Win32 lib

Rajkumar R12-May-08 19:28

Rajkumar R

12-May-08 19:28

what about using a wrapper function which doesnot include MFC headers in its declaration to get and set properties with CWinApp based class.

fread error in Console application

Anu_Bala12-May-08 18:22

Anu_Bala

12-May-08 18:22

I use FILE to read datas from file.But it does not read full datas.
For Ex: if my file have 9 datas it reads only 6 datas then it jumped out from the loop.
when i see the YCS file.. it contains 9 datas, so no problem in writing.
Problem only in reading data. THis is my code...Whats the problem???Pls help me.
void ReadThermodata()
{
char FPath[] = "C:\\SelCompLst.YCS";
FILE *fp;
SThermoData pData;
if((fp = fopen((LPCTSTR)FPath,"r"))==NULL)
{
return;
}
int cnt = 0;
while( fread( &pData, sizeof( struct SThermoData ), 1 ,fp ) )
{
ThermoDataList.push_back(pData);
cnt = cnt + 1;
}
}

Anu

Re: fread error in Console application

namaskaaram12-May-08 19:34

namaskaaram

12-May-08 19:34

This is just a wild guess, try opening the file in "r+b" mode...
when the file is opened in text mode,there is possibility for the file to stop at ascii values like 26....

Hope this helps!

Re: fread error in Console application

Rajkumar R12-May-08 19:35

Rajkumar R

12-May-08 19:35

it seems its a binary mode data file, you need to open it with "rb", some value of data in binary mode is EOF in text mode.

Re: fread error in Console application

Anu_Bala12-May-08 19:45

Anu_Bala

12-May-08 19:45

We tried "rb" to open the file. But no use. It just read very few datas.

Anu

Re: fread error in Console application

Rajkumar R12-May-08 20:10

Rajkumar R

12-May-08 20:10

check what is the error, using ferror, _get_errno

Re: fread error in Console application

David Crow13-May-08 3:10

David Crow

13-May-08 3:10

Anu_Bala wrote:
Whats the problem???Pls help me.

Have you bothered to use the debugger to step through the code?

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Image\Video Compression for Video Streaming

Akin Ocal12-May-08 13:08

Akin Ocal

12-May-08 13:08

Hello

I am looking for a image\video compression\decompression library to serve video over TCP\IP.
I get frames from my web cam in 320*240 resolution and RGB24 format so each frame is 320*240*3 = 230400 byte = 225 kbyte.

I am using Directshow to get streams from files or capture devices in server side. But I don't want use it also in client side. I am building my client in pure WinAPI. So I am looking for ANSI or only Win32 dependent open or closed free libraries for C\C++.

Can you suggest any ?

Best Regards,
Akin Ocal

Re: Image\Video Compression for Video Streaming

Rajesh R Subramanian12-May-08 18:57

Rajesh R Subramanian

12-May-08 18:57

Myphone[^] might give you good leads.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

Re: Image\Video Compression for Video Streaming

Rajesh R Subramanian12-May-08 19:58

Rajesh R Subramanian

12-May-08 19:58

This[^] might help you as well.

Nobody can give you wiser advice than yourself. - Cicero
.·´¯`·->Rajesh<-·´¯`·.
Codeproject.com: Visual C++ MVP

problem with dialog background color

sarat12-May-08 11:55

sarat

12-May-08 11:55

i have a dialog with background color

when i minimize the dialog and maximize again i am loosing the color of the dialog

if i switch to another window and come back to same dialog the color will appear on the dialog again

whats the problem

i should not loos the color of the dialod when i minni mize and maximize

any message handlr i have to handle ?

Re: problem with dialog background color

Naveen12-May-08 14:46

Naveen

12-May-08 14:46

How did you change the background color??

nave

[OpenedFileFinder]

Re: problem with dialog background color [modified]

namaskaaram12-May-08 18:33

namaskaaram

12-May-08 18:33

Seems like a paint issue.
Try overriding the OnEraseBkgnd() function.Write the code to put color on the screen there.

Hope this works out for you.(never tried this though...)

cheers!

PS:do comment or call the CDialog::OnEraseBkgnd( pDC ) first before putting in your paint code

modified on Tuesday, May 13, 2008 12:39 AM

Re: problem with dialog background color

namaskaaram12-May-08 18:42

namaskaaram

12-May-08 18:42

do comment or call the CDialog::OnEraseBkgnd( pDC ) first, before putting in your paint code

Re: problem with dialog background color

Hamid_RT12-May-08 19:23

Hamid_RT

12-May-08 19:23

CAn you show your code?

Re: problem with dialog background color

Nitheesh George13-May-08 0:27

Nitheesh George

13-May-08 0:27

Hi
Handle the WM_CTLCOLORDLG and place your painting code inside the handler.

<br />
<br />
HBRUSH CBkColorDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)<br />
{<br />
	HBRUSH hbr = CDialog::OnCtlColor(pDC, pWnd, nCtlColor);<br />
<br />
	<br />
<br />
	// TODO:  Change any attributes of the DC here<br />
	<br />
	if(nCtlColor == CTLCOLOR_DLG)<br />
	{<br />
		hbr = CreateSolidBrush(RGB(2,22,222));<br />
	}<br />
	else if(nCtlColor == CTLCOLOR_STATIC)<br />
	{<br />
		pDC->SetBkMode(TRANSPARENT);<br />
		hbr = CreateSolidBrush(RGB(2,22,222));<br />
	}<br />
<br />
	// TODO:  Return a different brush if the default is not desired<br />
	return hbr;<br />
}<br />
<br />

that's it

Regargs

Nitheesh

Re: problem with dialog background color

Mark Salsbery13-May-08 6:12

Mark Salsbery

13-May-08 6:12

Serious resource leak there Smile | :)

Those brushes should be created and destroyed
outside of the WM_CTLCOLOR handler!

Mark

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

CRecordView, finding and scrolling

Anders Gustafsson12-May-08 7:57

Anders Gustafsson

12-May-08 7:57

Hi!

I am working with a class, derived from CRecordView. It is a basic customer-maintenance type module where you can either select the record by typing in the key number or scroll back and forth, uisng the standard RecordView buttons. Problem is that quick lookups and scrolling appears to me mutually exclusive.

The person who originally wrote the class solved this by coding the lookup like this:
MoveFirst();
while(!IsEOF())
{
if(m_Nummer==nr)
return TRUE;
MoveNext();
}
This works if the number of records are reasonable (say up to 5000). If I code the lookup with a normal filter and Requery then it is lightinly fast, but Moves fail, presumably because it tries to move within that result set of one record.

Can anyone suggest a solution where I can:
a) Just type in a number and have it pull up the record and
b) be able to use previous/next navigation?

Re: CRecordView, finding and scrolling

David Crow12-May-08 8:49

David Crow

12-May-08 8:49

Anders Gustafsson wrote:
...Moves fail, presumably because it tries to move within that result set of one record.

Have you tried checking IsBOF() also?

"Love people and use things, not love things and use people." - Unknown

"To have a respect for ourselves guides our morals; to have deference for others governs our manners." - Laurence Sterne

Re: CRecordView, finding and scrolling [modified]

Anders Gustafsson12-May-08 9:01

Anders Gustafsson

12-May-08 9:01

Yes. If I set m_strFilter and do a requery, I find my record. I then clear m_strFilter. If I then hit previous/next the framework will kick off an extended fetch that will error with 100 (SQL No DATA).

What does work, but is kind of ugly is this:
Open the table, scroll through all records, for each do a:
m_pSet->GetStatus(rStatus);
m_Index[m_pSet->m_Nummer] = rStatus.m_lCurrentRecord + 1;

This builds an index of all records and their absolute numbers. Then in my lookup routine:

m_pSet->m_strFilter = "Nummer=?";
m_pSet->m_Nummerfilter = m_persGrund.m_persnrEdit.m_set.m_Nummer;
m_pSet->Requery();
m_pSet->m_strFilter = "";
m_pSet->Requery();
m_pSet->SetAbsolutePosition(m_Index[m_persGrund.m_persnrEdit.m_set.m_Nummer]);

But this seems like a tremenous kludge for such a simple task?

modified on Monday, May 12, 2008 3:16 PM

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