C / C++ / MFC

Re: Help on WMF/EMF to file

9-Jul-02 13:10

Probably the extension .dat has been reassociated with another program. Try opening the explorer, right clicking on a .dat file while pressing the shift key, selecting "Open with...", pushing "Another..." and selecting your program.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

How to use this Code?

NickOne9-Jul-02 10:58

NickOne

9-Jul-02 10:58

Hello all,

This is code from the MSDN page. I used there code to create Child windows and am a little lost. I made a onFileNew2 and when I click New2 (based on the ID_FILE_NEW2) it runs this code (which by the way is in the Mainframe class of an MDI project)and opens a child window.

I wrote code that opens Bitmaps, but I can't open a bitmap onto this. How coudl I utilise this code to something?? it sure would be nice to use it to open Bitmaps.

Thanks,

And sorry for asking so many questions

/////////////////////////////////////////////////////////////////////////////
// CMainFrame message handlers

// Example 1:
// CMainFrame::OnFileNewCMdiChildWnd() is a menu command handler for the
// CMainFrame class, which in turn is a CMDIFrameWnd-derived class.
// It shows the creation of a standard Windows MDI child window using
// the registered CMDIChildWnd class.
void CMainFrame::OnFileNewCMdiChildWnd()
{
CMDIChildWnd* pMDIChildWnd = new CMDIChildWnd;
VERIFY(pMDIChildWnd->Create(
NULL, // standard CMDIChildWnd class
_T("My MDIChildWnd"), // caption of MDI child window
WS_CHILD | WS_VISIBLE |
WS_OVERLAPPEDWINDOW, // window styles
rectDefault, // default rectangle size
this)); // parent window; can be NULL

// the default PostNcDestroy handler
// will delete this object when destroyed
}

Help on WMF/EMF to file

Jim Crafton9-Jul-02 10:26

Jim Crafton

9-Jul-02 10:26

OK I am creating a EMF/WMF DC
if I pass in a a filename to the CreateEnhMetaFile/CreateMetaFile
function and then use the resulting DC
to draw with and draw text on it, no text shows up
when I load the file in a program like PowerPoint, etc
(though curiously the File Open Dialog's preveiw does
show the text IF I output a WMF - nothing for a EMF)

Now if I create the meta file with a NULL filename (which
according to the docs is supposed to make one on memory)
and then say copy it to the clipboard and paste it into
PowerPoint all is good.
Any clues ? I have wasted the better part of an afternoon in
extreme frustration so any help would be much appreciated !

Thanks

Shog⁹9-Jul-02 15:46

Shog⁹

9-Jul-02 15:46

Hmm, can't say i know off the top of my head... Never had that problem (you're not using white as the text color or something are you Wink | ;)

)...

Would you care to try narrowing down the code to a few lines that still show the problem & posting that?

- Shog9 -

Aaah... It's time to relax. You know what that means: a glass of beer, your favorite ergo chair... And of course, The Code Project loaded on your Personal Computer System. So go on, and indulge yourself, put your feet up. Lean back and just enjoy the articles. After all, CP sooths even the savage Green Alien | [Alien]

worksheets::printpreview()

pnpfriend9-Jul-02 9:53

how dialog base application calls dos base application?

9-Jul-02 9:53

can anyone tell me how to use printpreview() , i couldn't find any example in c++ but vb.
in vb,
worksheets sheets;
sheets.("sheet1").printpreview

what bout in vc++?
I had tried,
worksheets sheets;
sheets.PrintPreview(COleVariant((short)TRUE));

but i can't view the printpreview.

pnpfriend9-Jul-02 9:48

Re: how dialog base application calls dos base application?

9-Jul-02 9:48

how can i call a win32 console application from dialog based application.

let's say, win32 console application takes an argument... like CString or char[ ]

how can i calling console app and passing an argument at the same time from the dialog based application??

S van Leent9-Jul-02 10:12

9-Jul-02 10:12

ShellExecute or ShellExecuteEx

HINSTANCE ShellExecute(
HWND hwnd,
LPCTSTR lpOperation,
LPCTSTR lpFile,
LPCTSTR lpParameters,
LPCTSTR lpDirectory,
INT nShowCmd
);

-- or --

BOOL ShellExecuteEx(
LPSHELLEXECUTEINFO lpExecInfo
);

typedef struct _SHELLEXECUTEINFO{
DWORD cbSize;
ULONG fMask;
HWND hwnd;
LPCTSTR lpVerb;
LPCTSTR lpFile;
LPCTSTR lpParameters;
LPCTSTR lpDirectory;
int nShow;
HINSTANCE hInstApp;

// Optional members
LPVOID lpIDList;
LPCSTR lpClass;
HKEY hkeyClass;
DWORD dwHotKey;
union {
HANDLE hIcon;
HANDLE hMonitor;
};
HANDLE hProcess;
} SHELLEXECUTEINFO, *LPSHELLEXECUTEINFO;

That will do it

Sjoerd van Leent

LPCSTR Dutch = "Double Dutch Smile | :)

Re: how ???

pnpfriend9-Jul-02 10:25

9-Jul-02 10:25

but how?
for my dos based application, which takes 3 arguments,

<br />
int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])<br />

is lpParameters will be the one i should set for my an argument?
what about int argc and the third parameter envp in main?
I dont' really understand because I have never call any applications from one applications.

thanks

pnpfriend9-Jul-02 10:43

9-Jul-02 10:43

This is how I had tried but it is not working! Cry | :((

the following code is in the dialog based application

<br />
void DialogBasedApp::OnTesting()<br />
{<br />
   SHELLEXECUTEINFO lpExecInfo;<br />
   const char* verb = "open";<br />
    lpExecInfo.cbSize  = sizeof(SHELLEXECUTEINFO);<br />
    lpExecInfo.lpFile = "c:\\printExcel\\Debug\\printExcel.exe";<br />
    lpExecInfo.fMask=SEE_MASK_DOENVSUBST|SEE_MASK_NOCLOSEPROCESS ;     <br />
    lpExecInfo.hwnd = NULL;<br />
    lpExecInfo.lpVerb = verb; <br />
    lpExecInfo.lpParameters = "c:\\testing.xls";<br />
    lpExecInfo.lpDirectory = NULL;<br />
    lpExecInfo.nShow = SW_SHOW ; <br />
    lpExecInfo.hInstApp = (HINSTANCE) SE_ERR_DDEFAIL ;   //WINSHELLAPI BOOL WINAPI result; <br />
   ShellExecuteEx(&lpExecInfo);  <br />
   if(lpExecInfo.hProcess != NULL)<br />
   {<br />
      ::WaitForSingleObject(lpExecInfo.hProcess, INFINITE);<br />
      ::CloseHandle(lpExecInfo.hProcess);<br />
   }<br />
   MessageBox("Finished Printing Excel");<br />
}<br />

my dos based application, which is called printExcel.cpp, is right below

<br />
int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])<br />
{ <br />
  AfxMessageBox(argv[0]);<br />
  return 1;<br />
<br />
}<br />

Honestly, i don't even know how to get the argument so no doubt that i have no idea where the program got wrong.
Cry | :((

can you tell me what and where it got wrong and how to fix it, please.

AlexMarbus9-Jul-02 11:08

AlexMarbus

9-Jul-02 11:08

Hi Win,

In this line:
int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])

is actually all you need. The 'argc' is the number of items specified on the commandline.
The array argv are all commandline arguments (including the name of the executable itself, printExcel.exe).

You can retrieve every argument by just using the index in the array:

int _tmain(int argc, TCHAR* argv[], TCHAR* envp[])
{
CString strArgument;
for (int i = 0; i < argc; i++)
strArgument = argv[i];

} // Not compiled, assuming it's correct

--
Alex Marbus
www.marbus.net
But then again, I could be wrong.

Rick York9-Jul-02 19:02

Rick York

9-Jul-02 19:02

I see two odd things here.

First, how can you call AfxMessageBox in a DOS-based app ? If it is really a DOS app then shouldn't you use printf ? You can add a getch() to see what the console window says before it closes.

FWIW, argv[0] will be the name of the executable always, regardless of what args are passed.
argv[1] will be the first passed argument and argc will tell you how many were passed. I think this has been said already but I will reiterate. Here is a loop to print out all passed args except for the exe's name (which is why we start at 1) :

for( int index = 1; index < argc; index += 1 )
fprintf( stdout, "arg %d is '%s'\n", index, argv[index] );

Second is a stylistic issue. You appear to be using Hungarian notation. Well, lp stands for long pointer and you have an instance of the structure so it is not a pointer.

pnpfriend10-Jul-02 2:21

10-Jul-02 2:21

oh yeah.. my dos based application support MFC therefore i can call AfxMessageBox(). you know when you build the project, in first step, you choose win32 console application and in step 2,
you choose hello world support MFC option instead of hello world and empty application.
for second question i can't explain coz i don't know what is Hungarian notation.. ^_^ no clue at all. what is it?

S van Leent9-Jul-02 23:06

9-Jul-02 23:06

Do you need the extra params of ShellExecuteEx? Else, I would just use:

ShellExecute(hInstance, //handle of the executing program*/
"open", // open the program
"C:\\program.exe", //Windows register understands that this will be an executable
"/?", // you don't know how to use program.exe, so typing a question mark
NULL, // You can give up de directory, but is not necessary
SW_SHOWNORMAL // show the damned console window
);

LPCSTR Dutch = "Double Dutch Smile | :)

pnpfriend10-Jul-02 2:53

10-Jul-02 2:53

Thanks.. but I need to pass an argument, which is going to be file name.
the dos based program is basically opening excel files and format it like setting pagesetup like all pages in landscape, scaling 70%, fixing the margins.. and so on.

the dialog based program, smpPrint, have files' names, including excel files. other files could be, .txt, .doc, .tif, etc. i want smpPrint to use the excelPrint, dos based program, will take a file name, and format it. that's what i want to do.
and i have to know when the user closed Microsoft Excel application, so i have to use shellexecutex. shellexecuteex have a parameter that can tell the application is closed .

pnpfriend10-Jul-02 3:57

Safe way of passing WNDPROC through functions

10-Jul-02 3:57

i got it .. thank you all..

S van Leent9-Jul-02 8:51

Re: Safe way of passing WNDPROC through functions

9-Jul-02 8:51

Is experimented with both on the heap and on the stact to pass a __stdcall (WNDPROC) to different functions. But the program (and explorer.exe!) crashes when I do so. Does anyone know how to safely pass a CALLBACK through a function.

eg:

WNDPROC xproc;

LRESULT CALLBACK WindowProc(...)
{
}

void a()
{
b((WNDPROC)WindowProc)
}

void b(WNDPROC wndproc)
{
// Do something like:
xproc = wndproc;
c();
}

void c()
{
SetWindowLong(hWnd, GWL_WNDPROC, (long)xproc);
}

Don't try this!

Thanks in advance,
Sjoerd van Leent

LPCSTR Dutch = "Double Dutch Smile | :)

Joaquín M López Muñoz9-Jul-02 13:06

Re: Safe way of passing WNDPROC through functions

9-Jul-02 13:06

There are a couple of issues in your code (maybe they are due to the fact that you have deleted some stuff in your post):

The right signature for WindowProc is

LRESULT CALLBACK WindowProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)

WindowProc should return a value. Also, typically you will forward most calls to DefWindowProc:

LRESULT CALLBACK WindowProc(HWND hwnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
  return DefWindowProc(hwnd,uMsg,wParam,lParam);
}

Apart from this, the code seems just fine.

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

S van Leent9-Jul-02 23:08

'asynchronous' version of _access()

9-Jul-02 23:08

That was indeed for easyness sake

Sjoerd

LPCSTR Dutch = "Double Dutch Smile | :)

Srini Kella9-Jul-02 8:08

Srini Kella

9-Jul-02 8:08

Guys:

I need to test the existence of a file on Novell server. I could use _access() function. But, under some conditions (example: when the Novell Server is in the process of shut-down), the _access() function takes very long time to return to the caller.

So, what I need is a scheme which will enable me testing the existence of a file asynchronously.

The Async version of access() should check the file existence and notify the caller once it is done with the file check.

Thanks in advance. Smile | :)

Re: 'asynchronous' version of _access()

Joaquín M López Muñoz9-Jul-02 12:57

9-Jul-02 12:57

Try using CreateFile in FILE_FLAG_OVERLAPPED mode (this probably will work only in NT/2k/XP systems.)

Joaquín M López Muñoz
Telefónica, Investigación y Desarrollo

RTF to XML

AlexMarbus9-Jul-02 6:58

AlexMarbus

9-Jul-02 6:58

Not sure whether I should post this in the VC++ section or XML, but since I request code, VC++ seemed the best place to me.

I'm searching for a piece of sourcecode that will convert RTF data to XML. Preferrably plain C++, not using MFC or anything else. Any hints on how to do this would be just as great.

The goal is to save a piece of RTF formatted data between a single XML tag.

--
Alex Marbus
www.marbus.net
But then again, I could be wrong.

Re: RTF to XML

Joaquín M López Muñoz9-Jul-02 13:26