🚀 go-pugleaf

���� wrote:

> I want to write a little software to log (write me in a file)
> each time that the user restart or shutdown the PC
> please help

Just create a little application that start when your PC start and stop 
when you shut it down. Since this is the API group, here is a pure win32 
API solution which logs a message even if the user logs out:

#include <windows.h>
#include <string>
#pragma hdrstop

const char FileName[] = "log.txt";
//----------------------------------------------------------------------
typedef LRESULT CALLBACK (*WINDOWPROC)(HWND,UINT,WPARAM,LPARAM);
//----------------------------------------------------------------------
void LogMessage(const std::string &Message)
{
   std::ofstream OutFile;
   OutFile.open(FileName,std::ios::app);
   if(OutFile)
   {
     OutFile<<Message<<std::endl;
   }
}
//----------------------------------------------------------------------
// window procedure
LRESULT CALLBACK WndProc(HWND HWnd,unsigned int Msg,WPARAM WParam,LPARAM 
LParam)
{
   switch (Msg)
   {
   	case WM_CLOSE:
			DestroyWindow(HWnd);
			break;
     case WM_CREATE:
       LogMessage("login");
       break;
     case WM_QUERYENDSESSION:
       LogMessage("logout");
       break;
     case WM_DESTROY:
       LogMessage("logout");
       PostQuitMessage(0);
       return 0;
   }
   return DefWindowProc(HWnd, Msg, WParam, LParam);
}

HWND CreateHiddenWindow(WINDOWPROC wndproc)
{
	WNDCLASS HiddenWindowClass ;
	HiddenWindowClass.style=0;
	HiddenWindowClass.lpfnWndProc=wndproc;
	HiddenWindowClass.cbClsExtra=0;
	HiddenWindowClass.cbWndExtra=0;
	HiddenWindowClass.hInstance=0;
	HiddenWindowClass.hIcon=0;
	HiddenWindowClass.hCursor=0;
	HiddenWindowClass.hbrBackground=0;
	HiddenWindowClass.lpszMenuName=NULL;
	HiddenWindowClass.lpszClassName="HiddenWindow";
	
	if(!RegisterClass(&HiddenWindowClass))return 0;
	HWND hwnd = CreateWindow(HiddenWindowClass.lpszClassName, "",
	                       WS_POPUP | WS_CAPTION | WS_CLIPSIBLINGS |
	                       WS_SYSMENU | WS_MINIMIZEBOX,
	                       GetSystemMetrics(SM_CXSCREEN)/2,
	                       GetSystemMetrics(SM_CYSCREEN)/2,
	                       0,0,0,0,NULL,NULL);
	if(hwnd == NULL)return 0;
	HMENU	SysMenu;	
	SysMenu=GetSystemMenu(hwnd,false);
	DeleteMenu(SysMenu,SC_MAXIMIZE,MF_BYCOMMAND);
	DeleteMenu(SysMenu,SC_SIZE,MF_BYCOMMAND);
         DeleteMenu(SysMenu,SC_MOVE,MF_BYCOMMAND);
	return hwnd;
}

//----------------------------------------------------------------------
int APIENTRY WinMain(HINSTANCE HInstance,HINSTANCE HPrevInstance,
                       LPTSTR lpCmdLine,int nCmdShow)
{
  	if (CreateHiddenWindow(WndProc))
	{
	  MSG msg;
	  while (GetMessage(&msg, NULL, 0, 0)>0)
	  {
	    TranslateMessage(&msg);
	    DispatchMessage(&msg);
	  }
	}
   return 0;
}
//----------------------------------------------------------------------

HTH
Michel
-- 
----------------------------------------
Michel Leunen
mailto: see my homepage.
C++Builder, BCC5.5.1 Web site:
http://www.leunen.com/
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