[Solved] Form closes immediately on OnBeforeInstall event in Windows Form Application

I want to create a form that has text box and button to receive a file location from the user. It just a shows form and closed immediately during installation. I want to stay the form till the user browse a location.How to do that ? Plaese help me. My code is:

Protected Overrides Sub OnBeforeInstall(savedState As IDictionary)
    MyBase.OnBeforeInstall(savedState)
    Dim formmysqlpathBrowse As New Form
    formmysqlpathBrowse.StartPosition = FormStartPosition.CenterScreen
    Dim mysqlpathTB As New TextBox
    Dim browseBTN As New Button
    formmysqlpathBrowse.Controls.Add(mysqlpathTB)
    formmysqlpathBrowse.Controls.Add(browseBTN)
    formmysqlpathBrowse.Show()
End Sub