Private Sub TextBox1_KeyPress1(ByVal sender As Object, ByVal e As System.Windows.Forms.KeyPressEventArgs) Handles TextBox1.KeyPress If e.KeyChar >= "A" And e.KeyChar <= "Z" Or e.KeyChar >= "a" And e.KeyChar <= "z" Then e.Handled = False Else MessageBox.Show ("只能输入字母！") e.Handled = True Exit Sub End IfEnd Sub
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