Invalidate Method (Region)
Collapse the table of content
Expand the table of content

Control.Invalidate Method (Region)


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.

Namespace:   System.Windows.Forms
Assembly:  System.Windows.Forms (in System.Windows.Forms.dll)

member Invalidate : 
        region:Region -> unit


Type: System.Drawing.Region

The Region to invalidate.

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.

.NET Framework
Available since 1.1
Return to top
© 2016 Microsoft