How To Kill A Process From Your Application

[TheCodeCracker]

hi

I like to ask that how can i kill or close a process from my code

suppose a process is already running in the memory e.g Notepad opened or some game is running than how can we close it from our code.

(languages can be any :masm, c++, vb).

[oricode]

Hi,I will explain this using the example of "Notepad". Suppose you have an instance of Notepad running, with the title "untitled - Notepad". To kill this from your application , you need to do the following :-

Declare the functions from user32.dll

public const int WM_SYSCOMMAND = 0x0112;
		public const int SC_CLOSE = 0xF060;
		[DllImport("user32.dll")]
		public static extern int FindWindow(
			string lpClassName,  // class name
			string lpWindowName  // window name
			);
		[DllImport("user32.dll")]
		public static extern int SendMessage(
			int hWnd,	  // handle to destination window
			uint Msg,	   // message
			int wParam,  // first message parameter
			int lParam   // second message parameter
			);

Then use the following to close the procces

		
				string myClass = "notepad"; string myTitle = "untitled - Notepad";
			int HND = FindWindow(myclass, myTitle);  //returns the handle of the window.
			if (HND != 0 )
			{ 
				int retn = SendMessage(HND, Win32.WM_SYSCOMMAND, Win32.SC_CLOSE, 0);   //Sends the message to that process to close.
			}

The above is in C#, hope you can do this in VB(almost the same).

Oricode.

Edited November 16, 2007 by oricode

[GaBoR]

You can use these functions:

GetWindowThreadProcessId, OpenProcess, TerminateProcess.

Look them up here for details:

http://msdn2.microsoft.com/en-us/default.aspx

Edited November 16, 2007 by GaBoR

[ragdog]

hi

use this to kill a another app

.data
szProcs db "notepad.exe",0
KillProcess Proc _IdProcess:DWORD
LOCAL uProcess:PROCESSENTRY32
LOCAL hSnapshot:DWORD 
		mov	uProcess.dwSize, sizeof uProcess
		invoke	CreateToolhelp32Snapshot, TH32CS_SNAPPROCESS, 0
		mov	hSnapshot, eax
	 	invoke	Process32First, hSnapshot,addr uProcess
	.while eax
		xor	ecx, ecx
		lea	esi, [uProcess.szExeFile]
		mov	ebx, esi
		dec	ebx
		invoke	lstrlen, esi
		add	esi, eax
		.while esi!=ebx
			invoke	lstrcmpi, esi, _IdProcess
			.if !eax
				invoke	OpenProcess, PROCESS_TERMINATE, 1, uProcess.th32ProcessID
				invoke	TerminateProcess, eax, 0
				jmp	done
			.endif
	; optimize this
			dec	esi
		.endw
		invoke	Process32Next, hSnapshot, ADDR uProcess
	.endw
	done:
		invoke	CloseHandle, hSnapshot
	ret
KillProcess endp

greets

ragdog

Edited November 16, 2007 by ragdog

[TheCodeCracker]

Thanks All of you for your kind suggestions. I have understood all the three styles to Kill another process.

Thank you all again