主题：[求助]每一窗口的菜单按钮刚开始必须按两下才能使用，关闭窗口重新打开又得按两下，有项目

Dim tab As WinForm.TabControl = Forms("主界面").Controls("导航")
tab.Select
For ig As Integer = 0 To tab.TabPages.Count -1
    If Forms("主界面").Controls("导航").TabPages(ig).text = "窗口1" Then
        Forms("主界面").Controls("导航").SelectedIndex = ig
        Return
    End If
Next
Dim Name As String = "窗口1"

tab.TabPages.Add(name,name)
Dim pb = tab.BaseControl
Forms(Name).OPEN(-1000,-1500)
Forms(Name).BaseForm.TopLevel = False
Forms(Name).BaseForm.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None
Forms(Name).BaseForm.Dock = System.Windows.Forms.DockStyle.Fill
PB.TabPages(name).Controls.Clear
PB.TabPages(name).Controls.add(Forms(Name).BaseForm)
tab.SelectedPage = tab.TabPages(name)

Dim tab As WinForm.TabControl = Forms("主界面").Controls("导航")
For ig As Integer = 0 To tab.TabPages.Count -1
    If tab.TabPages(ig).text = "窗口1" Then
        tab.SelectedIndex = ig
        tab.Form.Select
        tab.Select
        Return
    End If
Next
Dim Name As String = "窗口1"

tab.TabPages.Add(name,name)
Dim pb = tab.BaseControl
Forms(Name).OPEN(-1000,-1500)
Forms(Name).BaseForm.TopLevel = False
Forms(Name).BaseForm.FormBorderStyle = System.Windows.Forms.FormBorderStyle.None
Forms(Name).BaseForm.Dock = System.Windows.Forms.DockStyle.Fill
PB.TabPages(name).Controls.Clear
PB.TabPages(name).Controls.add(Forms(Name).BaseForm)
tab.SelectedPage = tab.TabPages(name)
tab.Form.Select
tab.Select