# dkim_set_user_context()

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SYNOPSIS |
    #include <dkim.h>
    DKIM_STAT dkim_set_user_context(
    	DKIM *dkim,
            void *ctx);
    );
Specifies an opaque user context pointer to be passed to the DNS callback set by `dkim_set_dns_callback()`, if any.
DESCRIPTION |
Called When | `dkim_set_user_context()` can be called at any time prior to DNS operations while verifying.
ARGUMENTS |
Argument | Description
--- | ---
dkim | Message-specific signing handle, returned by `dkim_sign()` or `dkim_verify()`. Note that since DNS operations only take place while verifying, this is really only meaningful in the latter case.
ctx | A pointer to a user-generated context handle referencing data specific to the message being signed or verified by the handle provided above.
RETURN VALUES | DKIM_STAT_OK -- success
NOTES | The context pointer, if set, will be passed as-is to the DNS callback, if any. It can also be retrieved by the caller at any time using the `dkim_get_user_context()` function.

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