invalidate() [5/6]

virtual void xtd::forms::control::invalidate ( const drawing::region &  region ) const

virtual

Invalidates the specified region of the control (adds it to the control's update region, which is the area that will be repainted at the next paint operation), and causes a paint message to be sent to the control.

Parameters

region

A xtd::drawing::region that represents the region to invalidate.

Remarks

Calling the invalidate method does not force a synchronous paint; to force a synchronous paint, call the update method after calling the Invalidate method. When this method is called with no parameters, the entire client area is added to the update region.