Does anyone know how to do single instance in VB.. Pls help me...

What exactly are you asking? Please describe the problem better.

I don't think there is any one specific way to limit a program to a single instance. Some use a registry entry to determine if there is an instance already running, while others use a file or create a system-wide semaphore (see MSDN for CreateSemaphore() win32 api function)

> Does anyone know how to do single instance in VB.. Pls help me...

Are you talking about creating class instances in a VB program... ?

Hi,

Use this Code :
In ur MDIFormLoad Or the StartUp Form Load.

Private Sub MYMDIForm_Load()
    If App.PrevInstance Then
        End
    End If
End Sub