Question

I’m trying to make a timer in c++. I’m new to c++. I found this code snippet

UINT_PTR SetTimer(HWND hWnd, UINT_PTR nIDEvent, UINT uElapse, TIMERPROC lpTimerFunc);

I put it in my global variables and it tells me

Error 1 error C2373: ‘SetTimer’ : redefinition; different type modifiers

I’m not sure what this means. Is there a more proper way to define a timer?

I’m not using mfc / afx

Thanks

Answer 1

You should call it like this:

void CALLBACK TimerProc(
 HWND hwnd, 
 UINT uMsg, 
 UINT idEvent, 
 DWORD dwTime 
)
{
 //do something
}

SetTimer(NULL, NULL, 1000, TimerProc);

This would set a timer for 1 second and will call TimerProc when it expires. Read TimerProc MSDN here: http://msdn.microsoft.com/en-us/library/ms644907%28VS.85%29.aspx