In Vb How TO Send Terminate message To other running Process? - vb6

Question

I want to send Close Messge To Other Running Process
For that i have the name of that process
Not Process ID

Answer 1

Assuming you're using VB 6 (because you didn't specify .NET), you could the following code:
''#Module-level WinAPI Declarations
Private Const PROCESS_ALL_ACCESS = &H1F0FFF
Private Const TH32CS_SNAPPROCESS As Long = 2&
Private Type PROCESSENTRY32
dwSize As Long
cntUsage As Long
th32ProcessID As Long
th32DefaultHeapID As Long
th32ModuleID As Long
cntThreads As Long
th32ParentProcessID As Long
pcPriClassBase As Long
dwFlags As Long
szexeFile As String * 260
End Type
Private Declare Function OpenProcess Lib "kernel32.dll" (ByVal dwDesiredAccess As Long, ByVal blnheritHandle As Long, ByVal dwAppProcessId As Long) As Long
Private Declare Function ProcessFirst Lib "kernel32.dll" Alias "Process32First" (ByVal hSnapshot As Long, uProcess As PROCESSENTRY32) As Long
Private Declare Function ProcessNext Lib "kernel32.dll" Alias "Process32Next" (ByVal hSnapshot As Long, uProcess As PROCESSENTRY32) As Long
Private Declare Function CreateToolhelpSnapshot Lib "kernel32.dll" Alias "CreateToolhelp32Snapshot" (ByVal lFlags As Long, lProcessID As Long) As Long
Private Declare Function TerminateProcess Lib "kernel32.dll" (ByVal ApphProcess As Long, ByVal uExitCode As Long) As Long
Private Declare Function CloseHandle Lib "kernel32.dll" (ByVal hObject As Long) As Long
''#Public function to actually kill a process, given its name
Public Sub KillProcess(ByVal ProcessName As String)
Dim uProcess As PROCESSENTRY32
Dim RProcessFound As Long
Dim hSnapshot As Long
Dim SzExeName As String
Dim ExitCode As Long
Dim MyProcess As Long
Dim AppKill As Boolean
Dim AppCount As Integer
Dim i As Integer
If LenB(ProcessName) <> 0 Then
AppCount = 0
uProcess.dwSize = Len(uProcess)
hSnapshot = CreateToolhelpSnapshot(TH32CS_SNAPPROCESS, 0&)
RProcessFound = ProcessFirst(hSnapshot, uProcess)
Do
i = InStr(1, uProcess.szexeFile, Chr(0))
SzExeName = LCase$(Left$(uProcess.szexeFile, i - 1))
If Right$(SzExeName, Len(ProcessName)) = LCase$(ProcessName) Then
AppCount = AppCount + 1
MyProcess = OpenProcess(PROCESS_ALL_ACCESS, False, uProcess.th32ProcessID)
AppKill = TerminateProcess(MyProcess, ExitCode)
Call CloseHandle(MyProcess)
End If
RProcessFound = ProcessNext(hSnapshot, uProcess)
Loop While RProcessFound
Call CloseHandle(hSnapshot)
End If
End Sub
Basically what this code does is enumerate all currently running processes in order to find the one you want to kill. The CreateToolHelpSnapshot API function returns a snapshot of the processes, and then we loop through this snapshot with the Process32First and Process32Next functions. When it finds a match to the name you specified, it uses the TerminateProcess function to terminate that process and all of its threads. Note that this is untested on post-XP versions of Windows.
If you speak Win32 fluently, see the following MSDN article: Taking a Snapshot and Viewing Processes
Lots of the examples you find on the Internet (i.e., option one, option two) use EnumWindows to send a WM_CLOSE message to the windows associated with a particular process. The advantage of this is that it asks nicely—sending the WM_CLOSE message gives the process a chance to save any data and exit gracefully. TerminateProcess, as used in the above example, is not so nice—it's an instant buzz-kill. But it will allow you to end processes that don't own any windows. You didn't mention if this was a requirement in the question.
(Honestly, there isn't enough detail in the question for me to have any business trying to answer this question, but I'm procrastinating. If you need anything else, please edit your question to include more details and add a comment to let me know...)