Programming Forums > Application Development > C++

CodeWeasel · Feb 24th, 2006, 12:09 AM

Haven't posted in a while, figured I'd give you guys something from my personal code stash I've built up over the years.

It wouldn't let me create a new thread in the tutorials section, so I've posted it here...

Here's a little piece of code that'll get the exe name for each running process. You'll need to include windows.h.

(Toggle Plain Text)

HANDLE            hSnapShot=NULL;
	HANDLE            hResult = NULL;
	PROCESSENTRY32    processInfo;
	char*            pstrExeName;

	bool bFirst = true;
	::ZeroMemory(&processInfo, sizeof(PROCESSENTRY32));
	processInfo.dwSize = sizeof(PROCESSENTRY32);
	hSnapShot = CreateToolhelp32Snapshot(
		TH32CS_SNAPPROCESS, 0);
	if(hSnapShot == INVALID_HANDLE_VALUE)
		return NULL; 

	while((bFirst ? Process32First(hSnapShot, 
		&processInfo) : Process32Next(hSnapShot, 
		&processInfo)))
	{
		bFirst = false;
		pstrExeName = strrchr(processInfo.szExeFile, '\\');
		if(!pstrExeName)
			pstrExeName = processInfo.szExeFile;
		else
			pstrExeName++;
                          // Do whatever you want with the name here. In my
                          // BPK program it puts the string in the listbox on the left
	}
	if(hSnapShot)
		CloseHandle(hSnapShot);

Enjoy!

For an example of this piece of code in action, see my process utility here: http://www.freewebs.com/wombatex/bpk.htm

Cache · Feb 24th, 2006, 4:52 AM

I haven't looked at you program but it sounds very similar some something I made a whill back. There is another resent thread in here that shows how to list all processes the non toolhelp way. MSDN also has well a commented example for this approach.

Also, I think you forgot to mention to include: tlhelp32.h

CodeWeasel · Feb 24th, 2006, 12:19 PM

Yeah, my bad, forgot the toolhelp header. I think I pieced this together from MSDN code about a year or so ago, so that's why it uses toolhelp.

nnxion · Feb 25th, 2006, 8:06 AM

What's the difference between the toolhelp (snapshot) way and the other way?

Feb 24th, 2006, 12:09 AM	#1
CodeWeasel Newbie Join Date: Jul 2004 Location: Blacksburg, VA Posts: 13 Rep Power: 0	Windows API: How to obtain a list of currently running processes. Haven't posted in a while, figured I'd give you guys something from my personal code stash I've built up over the years. It wouldn't let me create a new thread in the tutorials section, so I've posted it here... Here's a little piece of code that'll get the exe name for each running process. You'll need to include windows.h. (Toggle Plain Text) HANDLE hSnapShot=NULL; HANDLE hResult = NULL; PROCESSENTRY32 processInfo; char* pstrExeName; bool bFirst = true; ::ZeroMemory(&processInfo, sizeof(PROCESSENTRY32)); processInfo.dwSize = sizeof(PROCESSENTRY32); hSnapShot = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0); if(hSnapShot == INVALID_HANDLE_VALUE) return NULL; while((bFirst ? Process32First(hSnapShot, &processInfo) : Process32Next(hSnapShot, &processInfo))) { bFirst = false; pstrExeName = strrchr(processInfo.szExeFile, '\\'); if(!pstrExeName) pstrExeName = processInfo.szExeFile; else pstrExeName++; // Do whatever you want with the name here. In my // BPK program it puts the string in the listbox on the left } if(hSnapShot) CloseHandle(hSnapShot); HANDLE hSnapShot=NULL; HANDLE hResult = NULL; PROCESSENTRY32 processInfo; char* pstrExeName; bool bFirst = true; ::ZeroMemory(&processInfo, sizeof(PROCESSENTRY32)); processInfo.dwSize = sizeof(PROCESSENTRY32); hSnapShot = CreateToolhelp32Snapshot( TH32CS_SNAPPROCESS, 0); if(hSnapShot == INVALID_HANDLE_VALUE) return NULL; while((bFirst ? Process32First(hSnapShot, &processInfo) : Process32Next(hSnapShot, &processInfo))) { bFirst = false; pstrExeName = strrchr(processInfo.szExeFile, '\\'); if(!pstrExeName) pstrExeName = processInfo.szExeFile; else pstrExeName++; // Do whatever you want with the name here. In my // BPK program it puts the string in the listbox on the left } if(hSnapShot) CloseHandle(hSnapShot); Enjoy! For an example of this piece of code in action, see my process utility here: http://www.freewebs.com/wombatex/bpk.htm

Feb 25th, 2006, 8:06 AM	#4
nnxion Programming Guru Join Date: Jun 2005 Location: elemental plane Posts: 1,429 Rep Power: 5	What's the difference between the toolhelp (snapshot) way and the other way? __________________ "Employ your time in improving yourself by other men's writings, so that you shall gain easily what others have labored hard for." -- Socrates

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Feb 24th, 2006, 4:52 AM	#2
Cache Hobbyist Join Date: Sep 2005 Posts: 266 Rep Power: 4	I haven't looked at you program but it sounds very similar some something I made a whill back. There is another resent thread in here that shows how to list all processes the non toolhelp way. MSDN also has well a commented example for this approach. Also, I think you forgot to mention to include: tlhelp32.h

Feb 24th, 2006, 12:19 PM	#3
CodeWeasel Newbie Join Date: Jul 2004 Location: Blacksburg, VA Posts: 13 Rep Power: 0	Yeah, my bad, forgot the toolhelp header. I think I pieced this together from MSDN code about a year or so ago, so that's why it uses toolhelp.

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Programming Forums > Application Development > C++

Windows API: How to obtain a list of currently running processes.