Function ToAscii 

pub unsafe extern "system" fn ToAscii(
    uvirtkey: u32,
    uscancode: u32,
    lpkeystate: *const u8,
    lpchar: *mut u16,
    uflags: u32,
) -> i32

#420 ToAscii

converts the specified virtual-keycode and keyboard state to the corresponding windows character or characters