Steamapiregistercallresult |link| Jun 2026

You need isteamfriends.h (for the request) and isteamclient.h (for the macro and base types).

void SomeFunction() CCallResult<MyClass, SomeResult_t> result; // Local variable! result.Set(hAPICall, this, &MyClass::OnResult); // Function ends – result destroyed, pending call crashes Steam's callback thread. steamapiregistercallresult

The macro (or template) stores the handle and tells the Steam internal dispatcher: "When hSteamAPICall finishes, find object and run OnEncryptedAppTicket 3. Key Parameters Breakdown The Handle ( SteamAPICall_t You need isteamfriends

So next time you write:

: This is the unique ID for your specific request. If you don't store this or register it, the data will return from Steam, but your game will ignore it. The Handler Object ( : Because C++ needs to know which The macro (or template) stores the handle and

// THIS IS THE MAGIC LINE: steamapiregistercallresult( m_SteamUserInfoResult, this, &CSteamUserLevelManager::OnUserInformationReceived ); m_SteamUserInfoResult.Set( hAPICall, this, &CSteamUserLevelManager::OnUserInformationReceived );

The steamapiregistercallresult macro (and its modern CCallResult equivalent) represents a core pattern in Steamworks development: asynchronous, type-safe, and object-oriented result handling. By mastering this pattern, you avoid crashes, race conditions, and silent data failures. Always ensure your result-handling objects live long enough, always check for k_uAPICallInvalid and bIOFailure , and always pump SteamAPI_RunCallbacks() on your main thread.