VC++ Code to control and monitor processes and applications - C / C++ / MFC Discussion Boards

mahesh kumar s12-Oct-04 2:25

12-Oct-04 2:25

hi,
Iam using a barcode reader which reads barcodes into any open windows
text,excel files.
the thing is, iam catching this barcode text into an edit box.
but i have found there is no way to tell wether the edit box is filled
by barcode reader or user typed into it.
the barcode reader has no driver and just reads and displays text
inside an open document/editbox.
by debugging, i have seen the reader generates WM_KEYDOwn messages
which is same as when a keyboard is physically pressed.
can any one tell me how to tell if a user has actually pressed the keyboard
instead of a virtual message generation.
Rgds,
Mahesh

Re: keyboard events

Jim Crafton12-Oct-04 5:07

Jim Crafton

12-Oct-04 5:07

Look at MW_KEYDOWN, WM_CHAR, and WM_KEYUP - read then *all* carefully and that should give you what you need.

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Re: keyboard events

mahesh kumar s12-Oct-04 18:53

mahesh kumar s

12-Oct-04 18:53

ACtually spart from the Pretranslate message, where in i check for the
WM_KEYDOWN message for filtering, im not getting any keydown evenet
either in OnKeyDown,Onchar functions.. this is strange and am
trying to figure out whats the issue !

Rgds,
Mahesh

How to show our own custom Print Dialog page from Word

prince1a12-Oct-04 2:22

prince1a

12-Oct-04 2:22

Hello
My doubt is regarding printer UI page that appears when we select print from an application. Can we replace the default printer page that appears when we select Print from an aplication program such as MS_Word with our own custom print dialog page ? If it is possible, which function in GDI, i have to redirect to ?

Thanks in advance

C# Webservice in C++

_Hacker12-Oct-04 2:07

_Hacker

12-Oct-04 2:07

I added a C# webservice in C++ but how do you use it in C++?

My brain is 2 small for all the knowledge that I need.

posting code?

7stud12-Oct-04 0:42

7stud

12-Oct-04 0:42

How do you quote or post code?

[code]text[/code]
[quote]text[/quote]
text

got it!

Re: posting code?

Neville Franks12-Oct-04 1:08

Neville Franks

12-Oct-04 1:08

Use the

pre and code

items on the Formatting bar below the message compositin area.

Neville Franks, Author of ED for Windows www.getsoft.com and Surfulater www.surfulater.com "Save what you Surf"

VC++ Code to control and monitor processes and applications

maha srikanth12-Oct-04 0:29

maha srikanth

12-Oct-04 0:29

I would like to know how to code using vc++ to find the current processes and applications .

Re: VC++ Code to control and monitor processes and applications

Antony M Kancidrowski12-Oct-04 4:01

Antony M Kancidrowski

12-Oct-04 4:01

This article may help

http://www.codeproject.com/threads/processapi.asp[^]

Ant.

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I'm coloured, yet clear.
I'm fruity and sweet.
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Re: VC++ Code to control and monitor processes and applications

sweep12312-Oct-04 4:09

sweep123

12-Oct-04 4:09

You could try the following code I modified to determine if a process is still running, deals with multiple instances:-

bool CExampleDlg::CheckProcess(CString processName, int instance)<br />
{<br />
	/* Check if process still running. Just use 0 for single instance<br />
           Returns true if still running.	*/<br />
<br />
	HANDLE hSnapShot = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS,0);<br />
	PROCESSENTRY32* processInfo = new PROCESSENTRY32;<br />
	processInfo->dwSize = sizeof(PROCESSENTRY32);<br />
	bool returnValue = false;<br />
	bool handleFound = false;<br />
	DWORD processID = 0;<br />
	HANDLE CSLProcess = NULL;<br />
<br />
	// Here we are passing snapshot handle and PROCESSENTRY32 structure to Process32Next() <br />
	// function. After execution, PROCESSENTRY32 structure will contain information about a process. <br />
	// We are iterating through a loop until we got FALSE and this means there is now no process left to visit in snapshot and our pointer is at the end of snapshot.<br />
<br />
	returnValue = false;<br />
	handleFound = false;<br />
	processID = 0;	// Init it<br />
	// But first do the 1st entry on its own!<br />
	Process32First(hSnapShot,processInfo);<br />
<br />
	// See if this name matches 'processName'; 0 = match<br />
	if(strcmp(processInfo->szExeFile, processName) == 0)<br />
	{<br />
		processID = processInfo->th32ParentProcessID;<br />
		if(instance == 0)<br />
		{<br />
			returnValue = true;<br />
			handleFound = true;			// Get our entry<br />
		}<br />
		else<br />
		{<br />
			if(processID == Idux_ProcID[instance - 1])<br />
			{<br />
				handleFound = true;			// Get our entry<br />
				returnValue = true;<br />
			}<br />
		}<br />
	}<br />
	while((Process32Next(hSnapShot,processInfo)!=FALSE) && (handleFound == false))<br />
	{<br />
		// See if this name matches 'processName'; 0 = match<br />
		if(strcmp(processInfo->szExeFile, processName) == 0)<br />
		{<br />
			processID = processInfo->th32ProcessID;<br />
			if(instance == 0)<br />
			{<br />
				returnValue = true;<br />
				handleFound = true;			// Get our entry<br />
			}<br />
			else<br />
			{<br />
				if(processID == Idux_ProcID[instance - 1])<br />
				{<br />
					handleFound = true;			// Get our entry<br />
					returnValue = true;<br />
				}<br />
			}<br />
		}<br />
	}<br />
<br />
	//Don’t forget to close handle.<br />
	CloseHandle(hSnapShot);<br />
	delete processInfo;<br />
<br />
	return returnValue;<br />
}

compatibility between vc++ 6.0 and vc++.net

amey nikumbh11-Oct-04 23:27

amey nikumbh

11-Oct-04 23:27

need information regarding the compatibility abt the vc++ 6.0 with vc++.net
can code written in vc+ 6.0 will run on vc++.net?
pls give me all compatibility issues between these two technology

difference between RGB type and YUV type

Guoguor11-Oct-04 23:11

Guoguor

11-Oct-04 23:11

What's the difference between type RGB and YUV type?

free like a bird

Re: difference between RGB type and YUV type

rrrado11-Oct-04 23:43

rrrado

11-Oct-04 23:43

http://encyclopedia.thefreedictionary.com/YUV

rrrado

Re: difference between RGB type and YUV type

David Crow12-Oct-04 6:49

David Crow

12-Oct-04 6:49

See if either of these help:

http://www.bnoack.com/index.html?http&&&www.bnoack.com/video/RGB_YPrPb.html

http://www.animemusicvideos.org/guides/avtech/colorspace.html

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

How to write the BITMAPINFOHEADER

Guoguor11-Oct-04 23:09

Guoguor

11-Oct-04 23:09

Hello everyone!
I want capture a picture from a playing file(the file is now playing at my display)

it support 16-bit YUYV type.

BITMAPINFOHEADER bih;
the question is:
How to write the parameters of bih?
such as
bih.biCompression,
bih.biXPelsPerMeter,
bih.biYPelsPerMeter,
bih.biBitCount.
Cause I'm a freshman,please explain in detail!
Thanks!

free like a bird

Help! Additional question

Guoguor11-Oct-04 23:19

Guoguor

11-Oct-04 23:19

go on the former question..........
Should I write the parameter bmiColors of BITMAPINFO?
if need,how?
And what's type it is?
what's regulation should I must obey?
Thanks!

free like a bird

Re: Help! Additional question

Sujan Christo11-Oct-04 23:32

Sujan Christo

11-Oct-04 23:32

Hi,
Have a look @ this article http://msdn.microsoft.com/library/default.asp?url=/library/en-us/gdi/bitmaps_7zfp.asp[^]
Sujan

CToolBar on a MFC Dialog

sweep12311-Oct-04 23:04

sweep123

11-Oct-04 23:04

Just started to try and use the CToolbar class on my MFC Dialog application.

Finding it a bit strange to use and dont know where to put the events (e.g. open file etc).

Does anyone have/know where a good example is as all I have found are MDI and SDI examples.

Note I have got he Toolbar on display, but would like to position it and attached events.

Regards,

how to use enumfonts?

Lido Paul11-Oct-04 22:54

Lido Paul

11-Oct-04 22:54

I wang to get all font supported by system with API EnumFonts,but i don't know how to use it ,and i dont know what i should do in callback.if u know how to do,give me some code,thanks.

Happy Gemini

Re: how to use enumfonts?

David Crow12-Oct-04 6:57

David Crow

12-Oct-04 6:57

Have you consulted MSDN?

int CALLBACK EnumFontFunc( CONST LPLOGFONT, CONST LPTEXTMETRIC, DWORD, LPARAM )
{
    return 1;
}
 
int nReturn = EnumFonts(hDC, lpszFaceName /* or NULL */, EnumFontFunc, 0);

"When I was born I was so surprised that I didn't talk for a year and a half." - Gracie Allen

char * & char []

sarath_babu11-Oct-04 22:52

sarath_babu

11-Oct-04 22:52

What is the difference between

char *ptr="babu"
char ptr[]="babu"

babu

Re: char * & char []

Bob Stanneveld11-Oct-04 23:33

Bob Stanneveld

11-Oct-04 23:33

Nothing...

The 2nd declaration is more readable through the program, as it is clear that you are using an array.

Multiply it by infinity and take it beyond eternity and you'll still have no idea about what I'm talking about.

Re: char * & char []

rrrado11-Oct-04 23:41

rrrado

11-Oct-04 23:41

There is a difference, check the disassembly

127:      char aaa[] = "ssss";
004B423D   mov         eax,[string "ssss" (005fd498)]
004B4242   mov         dword ptr [ebp-18h],eax
004B4245   mov         cl,byte ptr [string "ssss"+4 (005fd49c)]
004B424B   mov         byte ptr [ebp-14h],cl
128:      char *bbb = "bbb";
004B424E   mov         dword ptr [ebp-1Ch],offset string "bbb" (005fd46c)
129:
130:      char *cc;
131:
132:      cc = bbb;
004B4255   mov         edx,dword ptr [ebp-1Ch]   ; address of string is loaded from memory
004B4258   mov         dword ptr [ebp-20h],edx
133:      cc = aaa;
004B425B   lea         eax,[ebp-18h]   ; cc just gets address
004B425E   mov         dword ptr [ebp-20h],eax

rrrado

Re: char * & char []

rrrado11-Oct-04 23:35

rrrado

11-Oct-04 23:35

char *ptr -> ptr is pointer to memory, where the string is stored, you can set it later to point to another string.
char ptr[] -> array, you can only change string content ... i think shis will consume 4 bytes less memory than first definition Smile | :)

rrrado

non-modal dialog in dll

Frank Conrad11-Oct-04 21:47

Frank Conrad

11-Oct-04 21:47

hi,
i have an application wich load a dll:

typedef void (__cdecl DRDNDLL)(int);

void CProjectDoc::OnTest() {
CString str = "DrDnDll.dll";
HMODULE hmodule = ::LoadLibrary(str);
if(hmodule != NULL) {
DRDNDLL* dllFunc=(DRDNDLL*)GetProcAddress(hmodule,"Test");
if (dllFunc != NULL)
dllFunc (1);
else
AfxMessageBox("Error-GetProcAddress");
else {
CString dllstr = "Error-LoadLibrary: Can't find "+str;
AfxMessageBox(dllstr);
}
FreeLibrary(hmodule);
}

in the dll i have a dialog which is non-modal:

extern "C" __declspec(dllexport) __cdecl Test (int tst) {
Dlg_Test* dlg;
dlg->Create();
}

but the dialog calling crashed.

can anybody help me?
thanks frank

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