TimerChangeUserdats

# TimerChangeUserdata

Changes user data values for a timer.

### Synopsis

`Err TimerChangeUserdata (TimerHandle thandle, uint32 userdata1, uint32 userdata2)`

### Description

Changes the user data associated with a timer. The user data is delivered to you as part of the notification message for message-based timers. The user data is not meaningful for signal-based timers.

### Arguments

thandle
  Handle for a timer created by one of the TimerMsg or TimerSignal functions.

userdata1
  Value passed back to you in the msg_DataPtr field of the notification message.

userdata2
  Value passed back to you in the msg_DataSize field of the notification message.

### Return Value

Zero on success or a negative error code.

### Implementation

Library call implemented in lib3do.lib.

### Associated Files

lib3do.lib, timerutils.h