Public Class Form1
'เขียนในForm1_LoadของForm1
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles MyBase.Load
TextBox1.Text = " คำอธิบาย "
End Sub
'เขียนในeventMouseClick ของTextBox1
Private Sub TextBox1_MouseClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles TextBox1.MouseClick 'เขียนในeventMouseClick ของTextBox1
TextBox1.Clear()
End Sub
End Class