Retrieves the display screen capture.
Returns the screen capture in block data format (#6NNNNNN<block_data>) in response to the HCOP:SDUM:DATA? query.
|#6NNNNNN||Indicates the <block_data> length as a 6-digit decimal integer.|
|<block_data>||Block data of screen capture. The length is approximately 25 KBytes to 30 KBytes.|