WM TIMER

This message is posted when a timer times out.

Syntax

param1
    USHORT  idTimer;    /* Timer identity. */

param2
    ULONG   ulReserved; /* Reserved value, should be 0. */

Parameters

idTimer (USHORT) - input

Timer identity.

Any timer Ids that are not being used must be passed on the default window procedure.

ulReserved (ULONG) - input

Reserved value, should be 0.

Returns

ulReserved (ULONG) - returns

Reserved value, should be 0.

Remarks

This message is always queued and is processed specially by the WinGetMsg and WinPeekMsg calls, as follows:

1. Timers are processed only by the WinGetMsg and WinPeekMsg calls.
2. A timer posts only one WM_TIMER message at a time.
3. WM_TIMER messages are queued lower than all other messages except WM_SEM4 messages.

Default Processing

The default window procedure takes no action on this message, other than to set ulReserved to 0.