'Declaration Public ReadOnly Property Upload As HtmlBoxUpload
public HtmlBoxUpload Upload {get;}
This property returns the HtmlBoxUpload representing the upload dialog that appears when the ToolbarUploadButton is clicked. For all predefined ToolbarUploadButtons (all ToolbarUploadButtonType values except for ToolbarUploadButtonType.Custom) this property will be properly initialized.
Target Platforms: Windows 10, Windows 8.1, Windows 8, Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2