winform C#事件主要是用Click事件（当BUTTON获得焦点，按Enter时也会触发）

注意：如果在按钮上单击了鼠标左键，然后把鼠标移动到其他位置，再释放鼠标，将不会引发Click事件

可以在按钮中添加自定义事件

-Usage and usage BUTTON in DELPHI similar attributes to note are as follows

The BackColor background color

DialogResult click the returned DialogResult value (None, OK, Cancel, Abort, Retry, Ignore, Yes, No)

FlatStyle set the button style

Image Add Image (Note the picture ImageIndex)

AlignImage picture in a display position of the buttons

The TextAlign text display position in the button

Tag button to add object