Type Alias PFN_PRINTING_READPORT2 

pub type PFN_PRINTING_READPORT2 = Option<unsafe extern "system" fn(param0: HANDLE, param1: *mut u8, param2: u32, param3: *mut u32) -> BOOL>;

Aliased Type

pub enum PFN_PRINTING_READPORT2 {
    None,
    Some(unsafe extern "system" fn(HANDLE, *mut u8, u32, *mut u32) -> BOOL),
}

Variants

None

No value.

Some(unsafe extern "system" fn(HANDLE, *mut u8, u32, *mut u32) -> BOOL)

Some value of type T.