constants SmoothPropertyEnum
The SmoothPropertyEnum type specifies the properties of the layer that can be changed gradually. The AllowSmoothChange property specifies the properties of the layers that support smooth change. The SmoothPropertyEnum type supports the following values.

NameValueDescription
exSmoothChangeless0 The change of any of the following properties is not gradually.
exLayerTransparency1 Transparency,  Gets or sets a value that indicates percent of the transparency to display the layer.
exLayerBrightness2 Brightness,  Specifies the percent of brightness to apply to the layer.
exLayerContrast4 Contrast,  Specifies the percent of contrast to apply to the layer.