vb.net 里面有两种messagebox,一种是vb语言提供的msgbox,另一种是.net framework 提供的messagebox.在此统一使用messagebox.
Warning,提示警示信息：
MessageBox.Show("You are not allowed to enquiry!", "Warning", MessageBoxButtons.OK, MessageBoxIcon.Exclamation)
Error, 提示错误信息：
处理出错，或者出现异常的时候
MessageBox.Show(objEx.Message, "Error", MessageBoxButtons.OK, MessageBoxIcon.Error)
Information,显示消息：
MessageBox.Show("Created successfully.", "Information", MessageBoxButtons.OK, MessageBoxIcon.Information)
Alert, 询问信息：
Dim objResponse As MsgBoxResult
objResponse = MessageBox.Show(
"No record found!" & vbCrLf & "Do you want to create new record?",
"Alert",
MessageBoxButtons.OKCancel,
MessageBoxIcon.Exclamation)
If objResponse = MsgBoxResult.Ok Then
btnCreate.Enabled = True
End If