TravelOption

typedef enum {
 TO_NULL,
 TO_SELF,
 TO_OBJ_BLOCK_OUTPUT,
 TO_PROCESS
} TravelOption;
/* VisClass defines one other travel option: */
typedef enum {
 TO_VIS_PARENT=_FIRST_VisClass
} VisTravelOption;
/* GenClass defines some more travel options: */
typedef enum /* word */ {
 TO_GEN_PARENT=_FIRST_GenClass,
 TO_FOCUS,
 TO_TARGET,
 TO_MODEL,
 TO_APP_FOCUS,
 TO_APP_TARGET,
 TO_APP_MODEL,
 TO_SYS_FOCUS,
 TO_SYS_TARGET,
 TO_SYS_MODEL
} GenTravelOption;

This enumerated type can be used to specify the recipient of a message. Note that the values set up in the TravelOption , VisTravelOption , and GenTravelOption have been set up as descrete values.

TRUE

#define TRUE		-1	/* use as return value, not for comparisons */
#define FALSE		 0

TypeFromFormatID

word	TypeFromFormatID(type);
        ClipboardItemFormatID			type;

This macro extracts the format ID from the given clipboard format ID and manufacturer value.

UIFunctionsActive

typedef ByteFlags UIFunctionsActive;
#define UIFA_SELECT				0x80
#define UIFA_MOVE_COPY 				0x40
#define UIFA_FEATURES 				0x20
#define UIFA_CONSTRAIN 				0x10
#define UIFA_PREF_A 				0x08
#define UIFA_PREF_B 				0x04
#define UIFA_PREF_C 				0x02
#define UIFA_IN 				0x01
#define UIFA_ADJUST 				0x08
#define UIFA_EXTEND 				0x04
#define UIFA_MOVE 				0x08
#define UIFA_COPY 				0x04
#define UIFA_POPUP 				0x08
#define UIFA_PAN 				0x04

These flags describe the context of the user's input, providing some modal information.

UndoActionDataFlags

typedef struct {
dword 		UADF_flags;
word 		UADF_extraflags;
} UndoActionDataFlags;

UndoActionDataPtr

typedef struct {
void 		*UADP_ptr;
word 		UADP_size;
} UndoActionDataPtr;

UndoActionDataType

typedef enum /* word */ {
UADT_FLAGS,
UADT_PTR,
UADT_VM_CHAIN,
} UndoActionDataType;

UndoActionDataUnion

typedef union {
/* To find out the type of data stored in this
 * union, check the value of the UndoActionStruct's
 * UAS_dataType field. */
UndoActionDataFlags 				UADU_flags;
UndoActionDataPtr 				UADU_ptr;
UndoActionDataVMChain 				UADU_vmChain;
} UndoActionDataUnion;
#define NULL_UNDO_CONTEXT 0

UndoActionDataVMChain

typedef struct {
/* This structure is filled in by the code for
 * MSG_META_UNDO. VMChains passed to 
 * MSG_GEN_PROCESS_UNDO_ADD_ACTION should lie in the undo
 * file (which can be obtained by sending 
 * MSG_GEN_PROCESS_UNDO_GET_FILE). */
VMChain 			UADVMC_vmChain;
VMFileHandle 			UADVMC_file;
} UndoActionDataVMChain;