help me out pls

i need to show the running application if it is already running.For this i used
app.PrevInstance and used showwindow.Show widow never worked to me.
pls help me abt.
Thankyou
Gopal

Put this code in a Form

Code:

---

Private Declare Function BringWindowToTop Lib "user32" (ByVal hwnd As Long) As Long
Private Declare Function FindWindow Lib "user32" Alias "FindWindowA" (ByVal lpClassName As String, ByVal lpWindowName As String) As Long


Private Sub Command1_Click()
 If App.PrevInstance = True Then
  Let w& = FindWindow(vbNullString, "Form1") ' Replace Form1 with the caption of the App.
  BringWindowToTop w&
 End If
End Sub

---

VB Code:

Sub Main()
  If App.PrevInstance Then
    AppActivate "[i]Title of main form[/i]"
    End
  Else
    frmMain.Show
  End If
End Sub

:)