Lists all MSP tag identifiers.

Values:

IGMDTAG_ID_MSP_FORMAT	MSP metadata format identifier.
IGMDTAG_ID_MSP_KEY1	Magic number.
IGMDTAG_ID_MSP_KEY2	Magic number.
IGMDTAG_ID_MSP_WIDTH	Width of the bitmap in pixels.
IGMDTAG_ID_MSP_HEIGHT	Height of the bitmap in pixels.
IGMDTAG_ID_MSP_X_AR_BITMAP	X Aspect ratio of the bitmap.
IGMDTAG_ID_MSP_Y_AR_BITMAP	Y Aspect ratio of the bitmap.
IGMDTAG_ID_MSP_X_AR_PRINTER	X Aspect ratio of the printer.
IGMDTAG_ID_MSP_Y_AR_PRINTER	Y Aspect ratio of the printer.
IGMDTAG_ID_MSP_X_PRINTER_WIDTH	Width of the printer in pixels.
IGMDTAG_ID_MSP_Y_PRINTER_HEIGHT	Height of the printer in pixels.
IGMDTAG_ID_MSP_X_ASPECT_CORR	X aspect correction (unused).
IGMDTAG_ID_MSP_Y_ASPECT_CORR	Y aspect correction (unused).
IGMDTAG_ID_MSP_CHECKSUM	Checksum of previous 24 bytes.
IGMDTAG_ID_MSP_PADDING	Unused padding.