diff --git a/lib/std/os/windows/advapi32.zig b/lib/std/os/windows/advapi32.zig
index bace7ce85026..9ef63c3c7257 100644
--- a/lib/std/os/windows/advapi32.zig
+++ b/lib/std/os/windows/advapi32.zig
@@ -5,10 +5,12 @@ const DWORD = windows.DWORD;
 const HKEY = windows.HKEY;
 const BYTE = windows.BYTE;
 const LPCWSTR = windows.LPCWSTR;
+const LPWSTR = windows.LPWSTR;
 const LSTATUS = windows.LSTATUS;
 const REGSAM = windows.REGSAM;
 const ULONG = windows.ULONG;
 const WINAPI = windows.WINAPI;
+const FILETIME = windows.FILETIME;
 
 pub extern "advapi32" fn RegOpenKeyExW(
     hKey: HKEY,
@@ -33,3 +35,52 @@ pub extern "advapi32" fn RegCloseKey(hKey: HKEY) callconv(WINAPI) LSTATUS;
 // http://msdn.microsoft.com/en-us/library/windows/desktop/aa387694.aspx */
 pub extern "advapi32" fn SystemFunction036(output: [*]u8, length: ULONG) callconv(WINAPI) BOOL;
 pub const RtlGenRandom = SystemFunction036;
+
+pub const RRF = struct {
+    pub const RT_ANY: DWORD = 0x0000ffff;
+
+    pub const RT_DWORD: DWORD = 0x00000018;
+    pub const RT_QWORD: DWORD = 0x00000048;
+
+    pub const RT_REG_BINARY: DWORD = 0x00000008;
+    pub const RT_REG_DWORD: DWORD = 0x00000010;
+    pub const RT_REG_EXPAND_SZ: DWORD = 0x00000004;
+    pub const RT_REG_MULTI_SZ: DWORD = 0x00000020;
+    pub const RT_REG_NONE: DWORD = 0x00000001;
+    pub const RT_REG_QWORD: DWORD = 0x00000040;
+    pub const RT_REG_SZ: DWORD = 0x00000002;
+
+    pub const NOEXPAND: DWORD = 0x10000000;
+    pub const ZEROONFAILURE: DWORD = 0x20000000;
+    pub const SUBKEY_WOW6464KEY: DWORD = 0x00010000;
+    pub const SUBKEY_WOW6432KEY: DWORD = 0x00020000;
+};
+
+pub extern "advapi32" fn RegGetValueW(
+    hkey: HKEY,
+    lpSubKey: LPCWSTR,
+    lpValue: LPCWSTR,
+    dwFlags: DWORD,
+    pdwType: ?*DWORD,
+    pvData: ?*anyopaque,
+    pcbData: ?*DWORD,
+) callconv(WINAPI) LSTATUS;
+
+pub extern "advapi32" fn RegLoadAppKeyW(
+    lpFile: LPCWSTR,
+    phkResult: *HKEY,
+    samDesired: REGSAM,
+    dwOptions: DWORD,
+    reserved: DWORD,
+) callconv(WINAPI) LSTATUS;
+
+pub extern "advapi32" fn RegEnumKeyExW(
+    hKey: HKEY,
+    dwIndex: DWORD,
+    lpName: LPWSTR,
+    lpcchName: *DWORD,
+    lpReserved: ?*DWORD,
+    lpClass: ?LPWSTR,
+    lpcchClass: ?*DWORD,
+    lpftLastWriteTime: ?*FILETIME,
+) callconv(WINAPI) LSTATUS;