Type Alias GRAYSTRINGPROC 

pub type GRAYSTRINGPROC = Option<unsafe extern "system" fn(HDC, LPARAM, c_int) -> BOOL>;

Aliased Type

pub enum GRAYSTRINGPROC {
    None,
    Some(unsafe extern "system" fn(*mut HDC__, isize, i32) -> i32),
}

Variants

None

No value.

Some(unsafe extern "system" fn(*mut HDC__, isize, i32) -> i32)

Some value of type T.