SetTimer in TForm descedant

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#2681

From: Alex Liu
Date: Thu, 01 Feb 2007 03:09

38 lines
1992 bytes

Hi,

I would like to implement SetTimer() in TForm which will update some 
controls in the form.
I try to write like this but fail:

void __fastcall TForm1::Button1Click(TObject *Sender)
{
SetTimer(Handle, 1, 500, (TIMERPROC)(TimerFcn));
}
//---------------------------------------------------------------------------

TIMERPROC TForm1::TimerFcn(    HWND hwnd, // handle of window for timer 
messages
    UINT uMsg, // WM_TIMER message
    UINT idEvent, // timer identifier
    DWORD dwTime  // current system time
   )
{
    // update control such as captions
}

in header file:
private: // User declarations
TIMERPROC TimerFcn(    HWND hwnd,     UINT uMsg,     UINT idEvent,     DWORD 
dwTime);


when i compile it shows "E2235 member function must be called or its address 
taken"
if i remove the TimerFcn declaration in TForm1 (i.e. TIMERPROC 
TimerFcn(...), i can pass compilation but  cannot access the controls.

what should i do?

Thanks in advance.

Alex

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From: "Alex Liu" <alexliu@hket.com>
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Subject: SetTimer in TForm descedant
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