Gets or sets the flag indicating whether the preview pane is currently busy. Some actions (especially those that could cause significant changes in the preview pane's state) raise this flag themselves, and cannot be performed when this flag was raised by another operation. This flag should be tested before attempting to change preview pane's properties or invoke methods on it.

'宣言
 
Public Property Busy As System.Boolean

'使用法
 
Dim instance As C1PreviewPane
Dim value As System.Boolean
 
instance.Busy = value
 
value = instance.Busy

public System.bool Busy {get; set;}