Label控件用于通知消息被发送还是遇到错误。
A Label control to signal whether the message was sent or an error was encountered.
单击按钮控件后，将会显示一个消息，如图12所示。
When the button control is clicked, a message displays as shown in figure 12.
设置Label控件根据消息是否被发送来显示信息。
Sets the Label control to be displayed accordingly if the message is sent.
Button控件用于发送或者尝试发送目前的邮件消息。
A Button control to send or attempt to send the actual mail message.
TextBox控件用于输入邮件消息的主题。
一系列可重写的方法在应用程序、窗体和控件级处理这些消息。
A series of overridable methods process these messages at the application, form, and control level.
显示选定控件的当前可能的消息处理程序列表。
Displays the list of current possible message handlers for the selected control.
当一个WM_NOTIFY消息被发送后，控件就得到了第一次的机会来处理它。
When a WM_NOTIFY message is sent, the control is offered the first chance to handle it.
此时将显示确认消息框，这是扩展程序控件添加的行为。
A confirmation message box is displayed, which is the behavior added by extender control.
这条消息分成两个部件(parts)，分别用于每个表单控件。
This message is divided into two parts, one for each form control.
这条消息分成两个部件(parts)，分别用于每个表单控件。
This message is divided into two parts, one for each form control.
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