[VB] CLose window if found

Try using something like this. using 

Code:

Process.MainWindowTitle

[size]
 to get the Title Text and 
[/size]

Code:

Process.CloseMainWindow

[size]
 to close down the UI, its a little more graceful than killing the Process.[/size]
Note: Contains does a case-sensitive search

Code:

Imports System.Diagnostics
Module Module1

    Sub Main()
        Dim myProcesses() As Process = Process.GetProcesses

        For Each p As Process In myProcesses
            If p.MainWindowTitle.Contains("Notepad") Then
                p.CloseMainWindow()
            End If
        Next

    End Sub

End Module

---

As far as Win API functions try something like this. Be aware if you close the parent window youwill close the children also.

Code:

Module Module1
    Private Declare Auto Function FindWindowEx Lib "user32" (ByVal parentHandle As Integer, _
                                              ByVal childAfter As Integer, _
                                              ByVal lclassName As String, _
                                              ByVal windowTitle As String) As Integer

    Private Declare Auto Function PostMessage Lib "user32" (ByVal hwnd As Integer, _
                                                            ByVal message As UInteger, _
                                                            ByVal wParam As Integer, _
                                                            ByVal lParam As Integer) As Boolean

    Dim WM_QUIT As UInteger = &H12
    Dim WM_CLOSE As UInteger = &H10


    Sub Main()
        Dim handle As Integer = FindWindowEx(0, 0, Nothing, "YourFormsTitle")
        PostMessage(handle, WM_CLOSE, 0, 0)
    End Sub

End Module