TIMERPROC callback function (winuser.h)

12/05/2018
2 minutes to read

An application-defined callback function that processes WM_TIMER messages. The TIMERPROC type defines a pointer to this callback function. TimerProc is a placeholder for the application-defined function name.

Syntax

TIMERPROC Timerproc;

void Timerproc(
  HWND Arg1,
  UINT Arg2,
  UINT_PTR Arg3,
  DWORD Arg4
)
{...}

Parameters

Arg1

Type: HWND

A handle to the window associated with the timer.

Arg2

Type: UINT

The WM_TIMER message.

Arg3

Type: UINT_PTR

The timer's identifier.

Arg4

Type: DWORD

The number of milliseconds that have elapsed since the system was started. This is the value returned by the GetTickCount function.

Return value

None

Requirements


Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	winuser.h (include Windows.h)