Function opensc_sys::sc_ctx_win32_get_config_value

pub unsafe extern "C" fn sc_ctx_win32_get_config_value(
    env: *const c_char, 
    reg: *const c_char, 
    key: *const c_char, 
    out: *mut c_void, 
    out_size: *mut size_t
) -> c_int

In windows: get configuration option from environment or from registers. @param env name of environment variable @param reg name of register value @param key path of register key @return SC_SUCCESS on success and an error code otherwise.