|
I am karnal and nowadys learning Vc.
I have a problem
"I have a Dialog based MFC program via i captured Bitmap, now i want to print this captured bitmap on default network printer,
The code for capturing bitmap is as follows
-------------------------------
void WriteBmp(char* filename,BITMAP *bmp,int* data)
{
BITMAPINFO Bmi;
memset(&Bmi,0,sizeof(BITMAPINFO));
Bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
Bmi.bmiHeader.biWidth = bmp->bmWidth;
Bmi.bmiHeader.biHeight = bmp->bmHeight;
Bmi.bmiHeader.biPlanes = 1;
Bmi.bmiHeader.biBitCount = bmp->bmBitsPixel;
Bmi.bmiHeader.biCompression = BI_RGB;
Bmi.bmiHeader.biSizeImage = bmp->bmHeight*bmp->bmWidth*bmp->bmBitsPixel/8;
FILE* image = fopen (filename,"wb");
if(image==0)
return;
int h = abs(Bmi.bmiHeader.biHeight);
int w = abs(Bmi.bmiHeader.biWidth);
Bmi.bmiHeader.biHeight=h;
Bmi.bmiHeader.biWidth=w;
int sz = Bmi.bmiHeader.biSizeImage;
BITMAPFILEHEADER bfh;
bfh.bfType=('M'<<8)+'B';
bfh.bfOffBits=sizeof(BITMAPFILEHEADER)+sizeof(BITMAPINFOHEADER);
bfh.bfSize=sz+bfh.bfOffBits;
bfh.bfReserved1=0;
bfh.bfReserved2=0;
fwrite(&bfh,sizeof(bfh),1,image);
fwrite(&Bmi.bmiHeader,sizeof(BITMAPINFOHEADER),1,image);
fwrite(data,sz,1,image);
fclose(image);
}
void CFullscreenDlg::OnShowWindow()
{
HANDLE hBitMap =(HBITMAP) ::LoadImage(AfxGetInstanceHandle(),
m_bmp.m_str,IMAGE_BITMAP,0,0,
LR_LOADFROMFILE | LR_CREATEDIBSECTION); // put here the handle of the window you would like to caputre
CBitmap bmp;
bmp.Attach((HBITMAP)hBitMap);
BITMAP bitmap;
bmp.GetBitmap(&bitmap);
int size = bitmap.bmWidth*bitmap.bmHeight*bitmap.bmBitsPixel/8;
BYTE *lpBits = new BYTE[size];
::GetBitmapBits((HBITMAP)hBitMap,size,lpBits);
WriteBmp("c:\\test.bmp",&bitmap,(int*)lpBits);
delete []lpBits;
}
-----------------------------------------------
so plz help me to solved out my printing problem.
Thanking u all
Karnal
karnal
|
|
|
|
|
How to create a .jpg file using VC++?
aasstt
|
|
|
|
|
|
I have a menu with several items, one of which is a submenu. Normally, I use Class Wizard and ON_UPDATE_COMMAND_UI to enable or disable menu items.
But I'm not able to use the same technique to gray a submenu name itself because it doesn't have a command ID associated with it. Is it possible to gray a submenu item using MFC?
Mallikarjun Avanna Lavate
|
|
|
|
|
i HAD GOT THE ANSWER.....
OnUpdateFLOWMASTERVERSION3(CCmdUI* pCmdUI)
{
// decide here whether to enable or disable pop-up menu:
if (pCmdUI->m_pSubMenu != NULL)
{
BOOL bEnable = TRUE; //if we want disable then writ false otherwise true
pCmdUI->m_pMenu->EnableMenuItem(pCmdUI->m_nIndex,
MF_BYPOSITION | (bEnable ? MF_ENABLED :
(MF_DISABLED | MF_GRAYED)));
}
}
|
|
|
|
|
Maybe it's difficult to use CmdUIUpdate.
The way I know is:
//Suppose the popup menu is the first item in the first drop-down menu.
CMenu* pMainMenu = GetMenu(); //"this" is CMainFrame
CMenu* pSubMenu = pMainMenu->GetSubMenu(0);//0 is the first window menu
pSubMenu->EnableMenuItem(0, MF_BYPOSITION | MF_GRAYED); //0 is the popup menu
Lane Yu
China
|
|
|
|
|
Hi,
I derived a CButtonEx from CButton. I implemented it as general purpose dll.
The problem is that the PreTranslateMessage is not working.
Is there any problem with PreTranslateMessage and a dll?
- NS -
|
|
|
|
|
According to MS, a custom DLL that is statically linked to the MFC library needs to have a CWinApp-derived class and a single object of that application class, as does an executable MFC application. The CWinApp object of the DLL, however, does not have a main message pump, as does the CWinApp object of an application. If the DLL opens modeless dialogs or has a main frame window of its own, the application's main message pump must call a routine exported by the DLL, which in turn calls the CWinApp::PreTranslateMessage member function of the DLL's application object.
See coding example and more info on the topic here:
http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vcsample98/html/_sample_mfc_dlltrace.asp[^]
SkyWalker
|
|
|
|
|
Thank you.
Does it mean that we can't write a stand alone button control (library) using dll (that is without processing the message specially for the button in the application)?
- NS -
|
|
|
|
|
You can write whatever dll you want 
I would recommend you using the following:
<br />
Overwrite the PreTranslateMessage()for your window derived class (whatever that may be):<br />
BOOL CDllWnd::PreTranslateMessage(MSG* pMsg)<br />
{<br />
if (IsDialogMessage(pMsg))<br />
return TRUE;<br />
<br />
return CWnd::PreTranslateMessage(pMsg);<br />
}<br />
-----------<br />
Export then a function<br />
extern "C" DllExport BOOL FAR PASCAL FilterDllMsg(LPMSG lpMsg)<br />
{<br />
AFX_MANAGE_STATE(AfxGetStaticModuleState())<br />
TRY<br />
{<br />
return AfxGetApp()->PreTranslateMessage(lpMsg);<br />
}<br />
END_TRY<br />
<br />
return FALSE;<br />
}<br />
-----------<br />
In user application: <br />
BOOL CYours::PreTranslateMessage(MSG* pMsg)<br />
{<br />
if (CTheBaseClass::PreTranslateMessage(pMsg))<br />
return TRUE;<br />
<br />
return FilterDllMsg(pMsg);<br />
}<br />
SkyWalker
-- modified at 6:53 Monday 3rd October, 2005
|
|
|
|
|
|
In my application i want to have a sys tray icon which has a Menu like
A
B
C --> C.1
C.2
C.3
D --> D.1
D.2
D.3
E --> E.1
E.2
A and B do not have pop-ups and are present to invoke some defined shortcuts
In my resource editor I have created a MEnu resource having the following
A
B
C
D
E
F
Elements for C , D and E and added and removed at run-time .
I want to be able to create functionality to be add the same . I was unable to find any routines where I would be able to add a CMenu (for say menu containing C.1 ,C.2 etc) to an existing CMenu(GetSubMenu(0)) .
Please help
THanks
-- modified at 21:58 Sunday 2nd October, 2005
|
|
|
|
|
is there a way to simulate a hardware interrupt in C++? i want to generate an interrupt for lets say mouse movement or keyboard press. is this possible?
thanks!
|
|
|
|
|
|
I'd like to create a program that will send a file (.txt) to its server. I came across articles regarding TCP/IP, Socket, WinSock, etc.. Which of these do I have to focused into in creating a simple server/client connections? of course these methods have their own advatages/disadvantages or limitations. There's a NDK program/article here in codeproject but I don't know if I'll just use it or better create network programming on my own.
One more thing, is it possible for a program to detect if the computer it currently resides into is the server or the client? So that my program will automatically shift into server mode/client mode depending where it is being launched. Thanx
|
|
|
|
|
For simple network comunication any article on Socket or Winsock should be enough.
If you want to indentify the current computer you can use gethostname() and then gethostbyname() if you want the IP address.
|
|
|
|
|
Look try to study and use the
socket , it the basic element
for networking.CSocket is a
usefull class provided by VC.
If u have defined the port range
say from 7000 to 8000 . Then u
can try connecting to it as a
Client .If there is successfull
connection then u can know that
the opposite machine is a Server
else it is Client .The program
just have to use a FOR loop.
Vikas Amin
Embin Technology
Bombay
vikas.amin@embin.com
|
|
|
|
|
benjnp wrote:
I'd like to create a program that will send a file (.txt) to its server. I came across articles regarding TCP/IP, Socket, WinSock, etc.. Which of these do I have to focused into in creating a simple server/client connections? of course these methods have their own advatages/disadvantages or limitations. There's a NDK program/article here in codeproject but I don't know if I'll just use
Having used the NDK library I can tell you it’s got a nice interface and works well. To send text files (or any files for that matter) you will need to add that functionality. There is however another simple project here that demonstrates sending files.
Network Transfer Of Files Using MFC's CSocket Class
[^]
benjnp wrote:
or better create network programming on my own.
As far as writing your own, go ahead there is no better way to learn network programming than doing it your self.
benjnp wrote:
One more thing, is it possible for a program to detect if the computer it currently resides into is the server or the client? So that my program will automatically shift into server mode/client mode depending where it is being launched. Thanx
That should be easy enough, when the main dialog or view starts, read the servers location (computer name) from where ever (registry or ini file) compare it to the local host (see gethostbyname()) if they are the same then start the app in server mode.
Good Luck...
DEBUGGING : Removing the needles from the haystack.
|
|
|
|
|
thanx for your help guys, i'll start looking for topics regarding socket programming right away
|
|
|
|
|
How can I make my computer a SERVER and have other computers connected to the INTERNET as client? My computer is a part of a LAN which connects to the internet through a gateway.
Ranjan
|
|
|
|
|
Hi Dear
Socket progamming is so nice, you can use CSocket & CAsyncSocket.
you can find meny sample in
Here]
Iman Ghasrfakhri
|
|
|
|
|
Is your computer behind a firewall? If so can you open some ports? Does it have a static address? Is this a private address (192.168.X.X, 172.16.X.X, 10.X.X.X)?
John
|
|
|
|
|
Hi all,
I've got the following problem:
I try to write an application which should use a specific function that
is available in a DLL.
Since I only need one of the various DLL functions and it is neccessary
to create an EXE file as small as possible I thought about not binding
the according LIB file into the project and loading the DLL at runtime.
My problem is, that I can identify the function name within the DLL
(by using DependencyWalker), but I don't know the function parameters
(type and order) I have to use. I also don't know the type of the
return value... 
Is there any possibility (some kind of utility prog or so...) to get some
information about the parameters to use???
Many thanks in advance!
Reinhard
|
|
|
|
|
it was my problem some month ago , I can't find any answer 
Iman Ghasrfakhri
|
|
|
|
|
reinhard_jd wrote:
My problem is, that I can identify the function name within the DLL
(by using DependencyWalker), but I don't know the function parameters
(type and order) I have to use. I also don't know the type of the
return value...
What exactly are you trying to do? Why do you want/need to call a function but you don't know about its parameters and return type? Even if you get the type and order of parameters, what values will you use? Even if you get the type of the return, what will you do with the returned value?
reinhard_jd wrote:
Since I only need one of the various DLL functions and it is neccessary
to create an EXE file as small as possible I thought about not binding
the according LIB file into the project and loading the DLL at runtime.
So you have a lib for that DLL? Even if you used it instead of loading the DLL yourself, you'd still need some header file with the function prototype, or at least the information to declare the prototype yourself... You have the lib but not the header files?
What's the DLL and what's the function? I really don't undertand your scenario... Or is this some kind of homework assignment?
--
jlr
http://jlamas.blogspot.com/[^]
|
|
|
|
General 
News 
Suggestion 
Question 
Bug 
Answer 
Joke 
Praise 
Rant 
Admin 
Submit an article or tip
