Use the EnumWindows function.
VB Code:
'Add to a Module
Declare Function GetWindowText Lib "user32" Alias "GetWindowTextA" (ByVal hwnd As Long, ByVal lpString As String, ByVal cch As Long) As Long
Declare Function GetWindowTextLength Lib "user32" Alias "GetWindowTextLengthA" (ByVal hwnd As Long) As Long
Declare Function EnumWindows Lib "user32.dll" (ByVal lpEnumFunc As Long, ByVal lParam As Long) As Long
Public Function EnumWindowsProc(ByVal hwnd As Long, ByVal lParam As Long) As Long
Dim Length As Long
Dim sName As String
Dim Temp As String
Static iCount As Integer
iCount = iCount + 1
Length = GetWindowTextLength(hwnd) + 1
If Length > 1 Then
sName = Space(Length)
GetWindowText hwnd, sName, Length
sName = Left(sName, Length - 1)
If sName Like "*My Title Fragment*" Then MsgBox "Window Found!"
End If
EnumWindowsProc = 1
End Function
'Usage:
EnumWindows AddressOf EnumWindowsProc, 0