winapi::um::winreg

Function RegQueryValueExA

Source 
pub unsafe extern "system" fn RegQueryValueExA(
    hKey: HKEY,
    lpValueName: LPCSTR,
    lpReserved: LPDWORD,
    lpType: LPDWORD,
    lpData: LPBYTE,
    lpcbData: LPDWORD,
) -> LSTATUS