我有一個包含多個 TabPage 的表單。我有一些按鈕，我只想在一個選項卡處于焦點時才可見。這是我的代碼：
$form = New-Object system.Windows.Forms.Form
$form.ClientSize = New-Object System.Drawing.Point(350,380)
$form.text = "Form"
$tabcontrol = New-object System.Windows.Forms.TabControl
$tabcontrol.Size = New-Object System.Drawing.Point(330,330)
$tabcontrol.Location = New-Object System.Drawing.Point(10,10)
$form.Controls.Add($tabcontrol)
$tab0 = New-object System.Windows.Forms.Tabpage
$tab0.DataBindings.DefaultDataSourceUpdateMode = 0
$tab0.UseVisualStyleBackColor = $True
$tab0.Text = "Tab0"
$tab0.AutoScroll = $true
$tabcontrol.Controls.Add($tab0)
$add_button = New-Object System.Windows.Forms.Button
$add_button.Size = New-Object System.Drawing.Size(23,23)
$add_button.Location = New-Object System.Drawing.Point(10,350)
$add_button.Text = " "
$form.Controls.Add($add_button)
$remove_button = New-Object System.Windows.Forms.Button
$remove_button.Size = New-Object System.Drawing.Size(23,23)
$remove_button.Location = New-Object System.Drawing.Point(43,350)
$remove_button.Text = "-"
$form.Controls.Add($remove_button)
$tab0.add_lostFocus({
$add_button.Hide()
$remove_button.Hide()
})
$tab0.add_gotFocus({
$add_button.Show()
$remove_button.Show()
})
$tab1 = New-object System.Windows.Forms.Tabpage
$tab1.DataBindings.DefaultDataSourceUpdateMode = 0
$tab1.UseVisualStyleBackColor = $True
$tab1.Text = "Tab1"
$tabcontrol.Controls.Add($tab1)
盡管有add_GotFocus, 和add_LostFocuson $tab0，但當我在選項卡之間切換時，按鈕仍然可見。
我做錯了什么，我該如何做到這一點？
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標籤：电源外壳表格