Gets the number of overlays in the DICOM dataset.
Pointer to a variable to be updated with the overlay count.
|0||The function was successful.|
|> 0||An error occurred. Refer to Return Codes.|
This function will return the number of overlays inside a DICOM dataset by counting the number of repeating groups in the range (6000-601E).
For an example, refer to LDicomDS::GetOverlayBitmapList.
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