Row number of the first line in the image to validate. In the LoadImage event, this corresponds to the first line in the buffer.
Number of lines to validate. In the LoadImage event, this corresponds to the number of lines in the buffer.
The Append method enables you to update an image in the LoadImage event, so that you can play an animation file as it is being loaded. The ValidateLines method lets you validate the lines that the animation playback engine will render to the target image.
If you pass null (Nothing in VisualBasic) in the animatedImage parameter for the RasterImageAnimator constructor, you can use the Append method to add frames to the multi-frame image during the animation. This is useful if you want to play an animated file as it is being loaded. If you need to reference the multi-frame image after the animation, you can call the Destroy method before you dispose this RasterImageAnimator object.
For an example, refer to Append.
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