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## nng_msg_alloc
Allocate a message.
### Synopsis
```c
#include <nng/nng.h>
int nng_msg_alloc(nng_msg **msgp, size_t size);
```
### Description
The `nng_msg_alloc` function allocates a new message with body length _size_ and stores the result in __msgp__.
Messages allocated with this function contain a body and optionally a header.
They are used with receive and transmit functions.
### Return Values
This function returns 0 on success, and non-zero otherwise.
### Errors
[horizontal]
`NNG_ENOMEM`:: Insufficient free memory exists to allocate a message.
### See Also
xref:nng_msg_free.adoc[nng_msg_free],
xref:nng_msg_body.adoc[nng_msg_body],
xref:nng_msg_dup.adoc[nng_msg_dup],
xref:nng_msg_header.adoc[nng_msg_header],
xref:nng_msg_header_len.adoc[nng_msg_header_len],
xref:nng_msg_len.adoc[nng_msg_len],
xref:nng_msg_capacity.adoc[nng_msg_capacity],
xref:nng_msg_reserve.adoc[nng_msg_reserve],
xref:nng_msg_realloc.adoc[nng_msg_realloc],
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