Macro button 

button!() { /* proc-macro */ }

Creates a new button control. The format is button!("attributes") where the attributes are pairs of key-value , separated by comma, in the format key=value or key:value. If the value is a string, use single quotes to delimit the value. The following attributes are supported:

• name or caption or text - the text displayed on the button
• type - the type of the button. The following values are supported:
  • Normal - a normal button
  • Flat - a flat button
• position attributes: x and y,
• size attributes: width or w (alias)
• margin attributes: left or l(alias), right or r(alias), top or t(alias), bottom or b(alias)
• Alignment attributes:
  • align or a(alias) - one of Left, Right, Top, Bottom, Center, TopLeft, TopRight, BottomLeft, BottomRight
  • dock or d(alias) - one of Left, Right, Top, Bottom, Center, TopLeft, TopRight, BottomLeft, BottomRight
• State attributes: enabled, visible

Example

button!("caption='Click me!', type=Flat, x=10, y=10, width=20")

Alternatively, the first parameter (if the key is not specified) is consider the caption:

button!("'Click me!', x:0, y=10, w:20")