ImgCount=<# images to load>, <grow-by value>
Specifies the number of images to be loaded into the XTREE, along with a "grow by" value which is a clue to the image list allocation routine but can generally be ignored (or set to 1). The image count would normally be the same as the maximum number of rows, unless you knew that many rows would not have images. Example:
ImgCount=100,1
The "grow-by" value is automatically adjusted upwards according to usage.
