从外部关闭带窗口的进程

Public Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long
Public Declare Function OpenProcess Lib "kernel32" (ByVal dwDesiredAccess As Long, ByVal bInheritHandle As Long, ByVal dwProcessId As Long) As Long
Public Declare Function GetWindowThreadProcessId Lib "user32" (ByVal hwnd As Long, lpdwProcessId As Long) As Long
Public Declare Function TerminateProcess Lib "kernel32" (ByVal hProcess As Long, ByVal uExitCode As Long) As Long

Private Const PROCESS_ALL_ACCESS = &H1F0FFF
Private Sub Form_Load()
Dim Fhwnd As Long, Phwnd As Long
Dim id As Long

Fhwnd = FindWindow(vbNullString, "计算器")
GetWindowThreadProcessId Fhwnd, id
Phwnd = OpenProcess(PROCESS_ALL_ACCESS, False, id)
TerminateProcess Phwnd, 0
End Sub

从外部关闭进程，首先要得到进程的Id，通过id得到句柄，然后调TerminateProcess关掉进程。