This enumerated type is used within the ICC_HEADER structure to indicate the primary platform.
typedef enum{NoPlatformSignature = 0x00000000L, /* No Platform Signature */MacintoshSignature = 0x4150504CL, /* 'APPL' */MicrosoftSignature = 0x4D534654L, /* 'MSFT' */SolarisSignature = 0x53554E57L, /* 'SUNW' */SGISignature = 0x53474920L /* 'SGI ' */} ICCPLATFORMSIGNATURE;