Option Explicit
Private Declare Function CloseHandle Lib "Kernel32.dll" (ByVal Handle As Long) As Long
Private Declare Function OpenProcess Lib "Kernel32.dll" (ByVal dwDesiredAccessas As Long, ByVal bInheritHandle As Long, ByVal dwProcId As Long) As Long
Private Declare Function TerminateProcess Lib "kernel32" (ByVal hProcess As Long, ByVal uExitCode As Long) As Long
Private Declare Function CreateToolhelpSnapshot Lib "kernel32" Alias "CreateToolhelp32Snapshot" (ByVal lFlags As Long, lProcessID As Long) As Long
Private Declare Function ProcessFirst Lib "kernel32" Alias "Process32First" (ByVal hSnapshot As Long, uProcess As PROCESSENTRY32) As Long
Private Declare Function ProcessNext Lib "kernel32" Alias "Process32Next" (ByVal hSnapshot As Long, uProcess As PROCESSENTRY32) As Long
Private Declare Function GetVersionExA Lib "kernel32" (lpVersionInformation As OSVERSIONINFO) As Integer
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 Type OSVERSIONINFO
dwOSVersionInfoSize As Long
dwMajorVersion As Long
dwMinorVersion As Long
dwBuildNumber As Long
dwPlatformId As Long
szCSDVersion As String * 128
End Type
Private Const PROCESS_ALL_ACCESS = 0
Private Const TH32CS_SNAPPROCESS As Long = 2&
Private Const WINNT As Integer = 2
Private Const WIN98 As Integer = 1
Public KillAppReturn As Boolean
Public Function getVersion() As Integer
Dim udtOSInfo As OSVERSIONINFO
Dim intRetVal As Integer
     
With udtOSInfo
    .dwOSVersionInfoSize = 148
    .szCSDVersion = Space$(128)
End With

intRetVal = GetVersionExA(udtOSInfo)

getVersion = udtOSInfo.dwPlatformId
End Function

Public Function Killapp(myName As String)
Select Case getVersion()
Case WIN98
Killapp9X (myName)
Case WINNT
KillappNT (myName)
End Select
End Function

Private Function KillappNT(myName 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
On Local Error GoTo Finish
appCount = 0
uProcess.dwSize = Len(uProcess)
hSnapshot = CreateToolhelpSnapshot(TH32CS_SNAPPROCESS, 0&)
rProcessFound = ProcessFirst(hSnapshot, uProcess)
Do While rProcessFound
    I = InStr(1, uProcess.szExeFile, Chr(0))
    szExename = LCase$(Left$(uProcess.szExeFile, I - 1))
    If Right$(szExename, Len(myName)) = LCase$(myName) Then
        KillAppReturn = True
        appCount = appCount + 1
        myProcess = OpenProcess(1&, -1&, uProcess.th32ProcessID)
        AppKill = TerminateProcess(myProcess, 0&)
        Call CloseHandle(myProcess)
    End If
    rProcessFound = ProcessNext(hSnapshot, uProcess)
Loop
Call CloseHandle(hSnapshot)
Finish:
KillAppReturn = False
End Function

Private Function Killapp9X(myName 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
On Local Error GoTo Finish
appCount = 0
uProcess.dwSize = Len(uProcess)
hSnapshot = CreateToolhelpSnapshot(TH32CS_SNAPPROCESS, 0&)
rProcessFound = ProcessFirst(hSnapshot, uProcess)
Do While rProcessFound
    I = InStr(1, uProcess.szExeFile, Chr(0))
    szExename = LCase$(Left$(uProcess.szExeFile, I - 1))
    If Right$(szExename, Len(myName)) = LCase$(myName) Then
        KillAppReturn = True
        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
Call CloseHandle(hSnapshot)
Finish:
KillAppReturn = False
End Function

Private Sub Command1_Click()
Killapp winamp.exe
End Sub