想只保留最小化按钮，去除最大化/还原按钮和关闭按钮。

用BaseMainForm的话，点击右上角的关闭按钮，先去执行子窗口的关闭，再去执行BeforeCloseProject。

这个过程，我真是无语了。假如是用户点错了呢？大大，你这么设计你究竟是什么想的？说说，我不怪你...

禁用关闭按钮，参考

全局代码

Public Const SC_CLOSE As Integer = &Hf060
Public Const MF_ENABLED As Integer = &H0
Public Const MF_GRAYED As Integer = &H1
Public Const MF_DISABLED As Integer = &H2

<DllImport("user32.dll", EntryPoint := "GetSystemMenu")> _
Public Function GetSystemMenu(hWnd As IntPtr, bRevert As Integer) As IntPtr
End Function

<DllImport("User32.dll")> _
Public Function EnableMenuItem(hMenu As IntPtr, uIDEnableItem As Integer, uEnable As Integer) As Boolean
End Function

调用代码

Dim hMenu As IntPtr = GetSystemMenu(basemainform.Handle, 0)
EnableMenuItem(hMenu, SC_CLOSE, (MF_DISABLED + MF_GRAYED) Or MF_ENABLED)

怎么我照做无效啊

删除了bin目录 还是无效

我是14版的系统

禁用主窗口的关闭按钮很简单：

RemoveXButton(baseMainform.handle)

14版测试无效