Returns how tall/long, in pixels, the image is. This is a runtime, read-only property.
Long
ObjectName. ImageLength
-1 is returned, if the Source doesn't know the length of the image.(hand scanners may do this).
ImageLength property, along with other properties about the current image information, is valid only in OnPreTransfer and OnPostTransfer event.
When an error occurs and IfThrowException property is TRUE, an exception will be thrown. Check ErrorCode property and ErrorString property for error information.
ImageBitsPerPixel property, ImagePixelType property, ImageWidth property, ImageXResolution property, ImageYResolution property
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