Yes, my question i write the mainpage have MenuStrip,
1.Company > go to clinetInformation.ShowDialog()
2.job > go to jobInformation.ShowDialog()

In clinetinformation form , i have a button, if onclick will go to jobInformation.ShowDialog()
So Two method can go to jobInformation form .
one is direct click , second is go to clinetInformation first and click the button go to jobInformation.....

All form is no problem .... i set the breakpoint in jobInformation page to test.....
If i go to menu 2.job > go to jobInformation.ShowDialog()
the breakpoint is work ......
After i go to 1.Company > go to clinetInformation.ShowDialog() and click the button go to jobInformation
In this time question appear, the breakpoint is not work, but the jobInformation also show ......

main page
--------------------
Public Class mainpage

    Private Sub JobToolStripMenuItem_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles JobToolStripMenuItem.Click
        clinetInformation.ShowDialog()
    End Sub

Private Sub JobToolStripMenuItem1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles JobToolStripMenuItem1.Click
        jobInformation.ShowDialog()
    End Sub
end class

jobinformation page
-------------------------
Public Class jobInformation                                                    'set the breakpoint , first time is ok , but second no interrupt
    Dim pass As Integer

Private Sub jobInformation_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
  'set the breakpoint , first time is ok , but second no interrupt

If pass = 1 Then
            If clinetInformation.txtCompany_no.Text <> "" Then
                cmboCompanyId.Text = clinetInformation.txtCompany_no.Text
            End If
end sub
    Public Property companypass() As Integer
        Get
            Return Me.pass
        End Get
        Set(ByVal value As Integer)
            pass = value
        End Set
    End Property
end class
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clinetInformation page

Public Class clinetInformation


Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles butPost.Click
        jobInformation.companypass = 1
        jobInformation.Show()
    End Sub
end class