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ERROR_HOOK_TYPE_NOT_ALLOWED
The requested Windows hook type is not permitted.
ERROR_HOOK_TYPE_NOT_ALLOWED is Win32 error 1458 (0x5B2). Hook installation is constrained by hook type, target thread, process architecture, desktop, integrity level, and current Windows support. A hook that is valid for a local thread may be disallowed as a global hook, and some legacy hook mechanisms are unsupported on current releases.
Reasons a hook can be rejected
- the chosen
WH_*hook does not support the requested global or thread scope - the callback module does not meet cross-process injection requirements
- 32-bit and 64-bit processes are mixed without the required architecture-specific components
- the target is on another desktop, session, or integrity boundary
- the application uses a journaling hook that is no longer supported
What to record
Capture the hook type, target thread ID, module handle, callback address, caller and target architectures, integrity levels, session IDs, desktops, and the exact SetWindowsHookEx parameters. Record whether the request is global or thread-specific and whether the process is packaged or otherwise restricted.
Diagnostic sequence
Read the restrictions for the exact WH_* value rather than extrapolating from another hook. Confirm that a global callback resides in an appropriate DLL where required and that matching components exist for each target architecture. Verify that the target thread belongs to the intended desktop and that the design does not cross a protected boundary.
For keyboard and mouse observation, evaluate whether Raw Input, accessibility APIs, event hooks, or application-level message handling provide the required behavior without invasive global hooks. Do not weaken integrity or security policy simply to make an unsupported hook load.
Recovery and redesign
Use an allowed scope, install architecture-correct hook components, move the feature to the target process, or replace the hook with a supported API. Treat installation failure as a capability decision and disable only the dependent feature. Repeatedly retrying the same prohibited hook cannot succeed.
Difference from invalid hook handles
ERROR_INVALID_HOOK_HANDLE concerns an existing HHOOK value. Error 1458 occurs at or around installation because the requested hook category or scope is not allowed.
Example
A 64-bit automation host tries to install one global DLL hook into both 64-bit and 32-bit applications. The unsupported target combination returns 1458. Providing documented architecture-specific components, or switching to UI Automation, resolves the capability mismatch.
References
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