Button-control-data structure.
typedef struct _BTNCDATA { USHORT cb; /* Length of the control data in bytes. */ USHORT fsCheckState; /* Check state of button. */ USHORT fsHiliteState; /* Highlighting state of button. */ LHANDLE hImage; /* Resource handle for icon or bit map. */ } BTNCDATA; typedef BTNCDATA * PBTNCDATA ;