List active windows - select a window - send keys to it

How can I list all the active windows, select one of them and then send some text to it?

For example MSN messenger. Making it periodically send a set message.

Please help me :confused:

Matt

Try findwindow api call then enumerate through the child windows of the application to locate the hwnd of the textbox, then send text the hwnd of the control using :

Code:

---

Option Explicit
Private Const WM_SETTEXT = &HC
Private Declare Function SendMessageByStr& Lib "user32" Alias "SendMessageA" _
 (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal _
  lParam As String)

Private Sub cmdSetText_Click()
Dim t$
Dim c&
t = "Hello World"
c& = SendMessageByStr(txt1.hWnd, WM_SETTEXT, 0, t)
End Sub

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Then find the hwnd of the "submit" button, and click it :
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Private Const BM_CLICK = &HF5

Code:

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SendMessage hWnd_Btn, BM_CLICK, 0, 0

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Wrap the code in a timer to do it periodically and you are done. Easy in theory, but getting the correct hwnd is the hardest part.