Vb.net 禁用Alt+；键关闭事件中的F4功能

如何防止窗体在keydown事件中被alt+f4键关闭？我面临的问题是按住ALT键，按F4键关闭窗体，但我想阻止窗体关闭。下面是我的代码

Private Sub frminstituteselect_KeyDown(sender As Object, e As KeyEventArgs) Handles Me.KeyDown
    If e.Alt = True And e.KeyCode = Keys.F4 Then
        e.Handled = True
    End If
End Sub

像这样试试

Private ALT_F4 As Boolean = False


Private Sub frminstituteselect_FormClosing(sender As Object, e As System.Windows.Forms.FormClosingEventArgs) Handles Form1.FormClosing
    If ALT_F4 Then
        e.Cancel = True
        Return
    End If
End Sub


Private Sub frminstituteselect_KeyDown(sender As Object, e As System.Windows.Forms.KeyEventArgs) Handles Form1.KeyDown
    ALT_F4 = (e.KeyCode.Equals(Keys.F4) AndAlso e.Alt = True)
End Sub

或者干脆

 Private Sub frminstituteselect_FormClosing(sender As Object, e As System.Windows.Forms.FormClosingEventArgs) Handles Form1.FormClosing
            e.Cancel = True
  End Sub

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谢谢你的回复。但我不想在表单关闭事件中使用。让我解释一下，我有一个表单和一个按钮在里面，点击按钮表单应该被关闭，但不是在alt+f4上，也不是在表单关闭事件中。还有一件事我想说的是，表单将通过按住ALT键并按F4来关闭，这是我不想要的。如果分别按下ALT键和F4键，您提到的代码将起作用。