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SetTimer issues...

Morning all...

I'm trying to solve the last part in my program here and am stuck once again.

I'm trying to utilize the SetTimer function and process the "callback" with the WndPrc message handler. No matter what I've tried, I can't find the right combination to avoid compiler errors.

Here is how I'm calling the SetTimer...

                                   protected: virtual void WndProc(Message% m) override
               {
                     if (m.Msg == WM_CREATE)
                     {
                           tid = SetTimer(NULL, 1, 50000, (TIMERPROC)NULL);
                     }
                     if (m.Msg == WM_TIMER)
                     {
                                    ...

I understand that I probably need a handle in the call of SetTimer, but I read somwhere that if it is in WndPrc it does not need it. Doesn't make sense to me, but ...

Here are the compiler errors...

Omni Monitor.obj : error LNK2028: unresolved token (0A00001A) "extern "C" unsigned int __stdcall SetTimer(struct HWND__ *,unsigned int,unsigned int,void (__stdcall*)(struct HWND__ *,unsigned int,unsigned int,unsigned long))" (?SetTimer@@$$J216YGIPAUHWND__@@IIP6GX0IIK@Z@Z) referenced in function "protected: virtual void __clrcall OmniMonitor::Form1::WndProc(class System::Windows::Forms::Message %)" (?WndProc@Form1@OmniMonitor@@$$FM$AAMXA$CAVMessage@Forms@Windows@System@@@Z)

Omni Monitor.obj : error LNK2019: unresolved external symbol "extern "C" unsigned int __stdcall SetTimer(struct HWND__ *,unsigned int,unsigned int,void (__stdcall*)(struct HWND__ *,unsigned int,unsigned int,unsigned long))" (?SetTimer@@$$J216YGIPAUHWND__@@IIP6GX0IIK@Z@Z) referenced in function "protected: virtual void __clrcall OmniMonitor::Form1::WndProc(class System::Windows::Forms::Message %)" (?WndProc@Form1@OmniMonitor@@$$FM$AAMXA$CAVMessage@Forms@Windows@System@@@Z)

Those errors are referencing my SetTimer call.

What I'm needing is help with the actual call here... If I need the handle, how do I call it? My knowledge on handles is limited, but everything I know, I've tried.

This is an urgent problem for me too, so source code help would be appreciated, not just links to definitions. Oh, I'm using VC++ 2005 Express Edition!
0
demilune
Asked:
demilune
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1 Solution
 
AlexFMCommented:
To solve linker problem add User32.lib to the list of Linker dependencies.
SetTimer call should be:

tid = SetTimer((HWND)this->Handle.ToPointer(), 1, 50000, (TIMERPROC)NULL);

BYW, you can use .NET Timer control. Maybe it is not available in the Express Edition, in this case use SetTimer.

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demiluneAuthor Commented:
Please don't think less of me, but how exactly do you do that? :)

Thanks!
0
 
AlexFMCommented:
What?
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demiluneAuthor Commented:
My bad...

How do you add the User32.lib to the list of Linker dependencies. I looked in the project option and found the section "linker" but saw no place to add the path to the library.

I must be really tired right now, as I have a feeling this is really simple.

Thanks!
0
 
AlexFMCommented:
Project - Properties - Configuration Properties - Linker - Input - Additional Dependencies. Type User32.lib.

This is from Professional Edition, in Express Edition it can be different.
0
 
demiluneAuthor Commented:
THANKS!!!
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