请问各位":1"是什么意思啊.
typedef struct BPP {
//
// Mark flags
//
ULONG fNewMark :1; // Newly Marked
ULONG fMarkAdd :1; // Mark for addition
ULONG fMarkDelete :1; // Mark for deletion
ULONG fMarkDisable :1; // Mark for disable
ULONG fMarkEnable :1; // Mark for enable
ULONG fMarkChange :1; // Mark for change
ULONG fReplacement :1; // Replaces a changed BP
//
// Flags to determine breakpoint type
//
ULONG fWndProc :1; // Window Proc BP: Requires fCodeAddr
ULONG fCodeAddr :1; // Code Addr. BP
ULONG fExpression :1; // Expression BP
ULONG fMemory :1; // Memory BP
ULONG fMsg :1; // Msg BP
ULONG fMsgClass :1; // Msg is Msg class (i.e. mask)
ULONG fMsgParsed :1; // Msg has been parsed
ULONG fTemporary :1; // Temp BP, for gountil
//
// Other flags
//
ULONG fHighlight :1; // Is the highlight currently marked?
ULONG fQuiet :1; // Quiet defer
ULONG fProcess :1; // Process set
ULONG fThread :1; // Thread set
请问各位":1"是什么意思啊.