Im working on WPF project with C++ and C#. I have written .idl file for communicating between these modules. I defined one enum like

typedef enum Samp{
    Samp1 =1,
    Samp2 =2,
    Samp3 =4,....
    Samp32=4294967296
}SampEnum;

each enum representing a number with only 1 bit set, now i need to add more enums, now it is taking 32 bit as default but i need to convert it to 64, how to change it. I tried these methods but all are giving compiler errors.

1st way is
i declared typedef for unsigned long long

typedef unsigned long long typeUll;

and tried to use this inside enum as

typedef enum Samp{
    Samp1 =typeUll(1),
    Samp2 =typeUll(2),
    ....
}SampEnum;

2nd way is using @bit_bound, i found in some link to use @bit_bound(64) like this

@bit_bound(64)
bitmask MyBitMask
{
    @position(0) flag0,
    @position(1) flag1,
    @position(2) flag2,
    @position(3) flag3,
    ...
    @position(63) falg63
};

they mentioned like if we use @bit_bound this way, it will be converted to —->

enum MyBitMask : uint64_t
{
    flag0 = 1 << 0,
    flag1 = 1 << 1,
    flag2 = 1 << 2,
    flag3 = 1 << 3,
    ....
    flag63 = 1<<63
};

For both im getting compiler errors. Can anyone help on this how to resolve this for supporting 64 bits in enum inside .idl files