窗体1:fmuser
Public User_id As Integer
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles Button1.Click
Dim f2 As Form2 = New Form2(Me) '直接把Form对象传递到Form2
f2.Show()
Me.Hide()
End Sub
窗体2:FmA
Private User_id as Integer
Private frm1 as fmUser
Public Sub New(fm as fmUser)
User_id = frm.User_id '从窗体1向窗体2传值
fm1=fm
End Sub
Private Button_OK_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles OK.Click
fm1.User_id = User_id '从窗体2向窗体1返回值
fm1.Show()
Me.Close()
End Sub