Type Alias EVENT_SIZE_CALLBACK 

pub type EVENT_SIZE_CALLBACK = Option<unsafe extern "C" fn(gauge_header: PGAUGEHDR, size: *mut UINT32)>;

Aliased Type

pub enum EVENT_SIZE_CALLBACK {
    None,
    Some(unsafe extern "C" fn(*mut GAUGEHDR, *mut u32)),
}

Variants

None

No value.

Some(unsafe extern "C" fn(*mut GAUGEHDR, *mut u32))

Some value of type T.