>sorry, i say not clear.....
>My question is one form pass one form .....
>See my code, 3 form .....
>i want to storageAdvice form onclick button ,will show the B form ,
>B form is a finder will pass a code to storageAdvice.TextBox1.Text
>
>

>In A.vb
>---------------
>storageAdvice = New Quotation_Add
>storageAdvice.MdiParent = Me
>storageAdvice.Show()
>
>
>In storageAdvice.vb
>-------------
>
>
> B.Show()
>
>
>
>In B.vb
>---------------
>
>storageAdvice.TextBox1.Text = "aaa"
>
>
>
>But after the result storageAdvice.TextBox1.Text  is blank
>
>

If you want to access a Textbox in the 'parent' form from form B pass a reference to it in the constructor. Form B:

Public Class B
    Public caller As Quotation_Add

    Public Sub New(ByVal caller As Quotation_Add)
        InitializeComponent()
        Me.caller = caller
    End Sub

    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
        caller.TextBox1.Text = "aaa"
    End Sub
End Class

Create with

 Dim aB As New B(Me)
aB.Show()