Communication between forms

Hi,
I've made a shell-program in outlookstyle.
From within that shell I open other programs that
are of type ActiveX DLL with form.
The shell is an exe file.
Now I want to communicate from within my ActiveX DLL with
the shell.
More specific, I want, when the ActiveX DLL gets the focus,
that there is a method triggered in the shell.

Is there somebody who could help me.

THANKS

Use FindWindowEx to find your previous App

Code:

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Private Declare Function FindWindowEx Lib "user32" Alias "FindWindowExA" (ByVal hWnd1 As Long, ByVal hWnd2 As Long, ByVal lpsz1 As String, ByVal lpsz2 As String) As Long

Private Sub Form_GotFocus()
  Dim APP_HWND As Long
 
  'If you have VB6, change ThunderRT5Form to ThunderRT6Form
  APP_HWND = FindWindowEx(0, 0, "ThunderRT5Form", "App Title")
  If APP_HWND <> 0 Then
      'Do a method here
  End If
End Sub

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