### Function: AddProcExt(param1, param2, param3, param4, param5, param6, param7, param8, param9, param10, param11, param12, param13)

**Description:**
Placeholder description.

**Parameters:**
- `param1`: Spawn - The spawn or entity involved.
- `param2`: unknown - Unknown type.
- `param3`: unknown - Unknown type.
- `param4`: unknown - Unknown type.
- `param5`: unknown - Unknown type.
- `param6`: int8 - Small integer or boolean flag.
- `param7`: int8 - Small integer or boolean flag.
- `param8`: float - Floating point value.
- `param9`: int8 - Small integer or boolean flag.
- `param10`: bool - Boolean value (true/false).
- `param11`: bool - Boolean value (true/false).
- `param12`: Item - An item reference.
- `param13`: int8 - Small integer or boolean flag.

**Returns:** None.

**Example:**

```lua
-- Example usage
AddProcExt(..., ..., ..., ..., ..., ..., ..., ..., ..., ..., ..., ..., ...)
```