Type Alias PFN_EngSubtractRgn 

pub type PFN_EngSubtractRgn = Option<unsafe extern "system" fn(hrgnresult: HANDLE, hrgna: HANDLE, hrgnb: HANDLE) -> i32>;

Aliased Type

pub enum PFN_EngSubtractRgn {
    None,
    Some(unsafe extern "system" fn(HANDLE, HANDLE, HANDLE) -> i32),
}

Variants

None

No value.

Some(unsafe extern "system" fn(HANDLE, HANDLE, HANDLE) -> i32)

Some value of type T.