设置窗体FormBorderStyle 属性的不同效果

默认值：Sizable。

可供设置的FormBorderStyle 如下表：

Value	Description
None	The form has no border.
FixedSingle	The form has a non-resizable single line border.
Fixed3D	The form has a non-resizable 3d border.
FixedDialog	The form has a thick, non-resizable, dialog style border that has no minimize or maximize boxes.
Sizable	The default. The form has a resizable border.
FixedToolWindow	The form has a non-resizable border that has only a close button. This style is used for tool windows.
SizableToolWindow	Same as FixedToolWindow but resizable.