Add support to core:windows to add/delete users.

main :: proc() {

	using fmt;
	using windows;

	username := "testuser";
	password := "testpass";

	ok := add_user("", username, password);
	fmt.printf("add_user: %v\n", ok);
	pi := windows.PROCESS_INFORMATION{};

	ok2, path := windows.add_user_profile(username);
	fmt.printf("add_user_profile: %v, %v\n", ok2, path);

	ok3 := windows.delete_user_profile(username);
	fmt.printf("delete_user_profile: %v\n", ok3);

	ok4 := windows.delete_user("", username);
	fmt.printf("delete_user: %v\n", ok4);

	// Has optional bool to not wait on the process before returning.
	b := run_as_user(username, password, "C:\\Repro\\repro.exe", "Hellope!", &pi);
	fmt.printf("run_as_user: %v %v\n", b, pi);
}

core/sys/windows/userenv.odin

@@ -7,4 +7,32 @@ foreign userenv {
 	GetUserProfileDirectoryW :: proc(hToken: HANDLE,
 	                                 lpProfileDir: LPWSTR,
 	                                 lpcchSize: ^DWORD) -> BOOL ---
+	LoadUserProfileW :: proc(
+		hToken: HANDLE,
+		lpProfileInfo: ^PROFILEINFOW,
+	) -> BOOL ---
+
+	// https://docs.microsoft.com/en-us/windows/win32/api/userenv/nf-userenv-createprofile
+	// The caller must have administrator privileges to call this function.
+	CreateProfile :: proc(
+		pszUserSid: LPCWSTR,
+		pszUserName: LPCWSTR,
+		pszProfilePath: wstring,
+		cchProfilePath: DWORD,
+	) -> u32 ---
+
+	// https://docs.microsoft.com/en-us/windows/win32/api/userenv/nf-userenv-deleteprofilew
+	// The caller must have administrative privileges to delete a user's profile.
+	DeleteProfileW :: proc(
+		lpSidString: LPCWSTR,
+		lpProfilePath: LPCWSTR,
+		lpComputerName: LPCWSTR,
+	) -> BOOL ---
+
+	// https://docs.microsoft.com/en-us/windows/win32/api/sddl/nf-sddl-convertsidtostringsida
+	// To turn a SID into a string SID to use with CreateProfile & DeleteProfileW.
+	ConvertSidToStringSidW :: proc(
+		Sid: ^SID,
+	  	StringSid: ^LPCWSTR,
+	) -> BOOL ---
 }