Table 1. Interface specification of the main platform.

Method name	Function	Return value	Remark
GetAppDirectory	Get the directory of the application	BSTR	None
GetBand	Get the pointer of the specified band	VOID	Para: VARIANT * outVar output the band pointer
GetBandData	Get the band data through a band pointer	VOID	Para: VARIANT * bandVar output the band data
GetLineParmManual	Get the parameters of the feature line obtained in a manual way	VOID	Return the slope and intercept of the feature line generated from the manual interaction with the 2D spectral feature space window
GetDataBlock	Get the specified data block of the specified band	VOID	Para: bandVar stores the pointer of the band to read, yStart and yEnd indicate the starting and ending row number of the data block respectively
WriteDataBlock	Write the specified data block of a specified band	VOID	Para: bandVar stores the pointer of the band to write, yStart and yEnd indicate the starting and ending row number of the data block respectively
CreateResultFile	Create a file for storing results	VOID	Create a file according to the specifications in the band or file templates VARIANT *tempBand and VARIANT *tempFile
BandsCompatibleTest	Test the compatibility of the band data	BOOL	Return the compatibility result
GetFileManual	Get one of files opened in the main platform	VOID	Para: VARIANT * outVar