🚀 go-pugleaf

Bob Gonder schrieb:
> Christian Lotze wrote:
> 
>> This increases count of win32 handles every time
>>  Createfile creates two handles
>>  CloseHandle closes only one of theses handles
>>
>> (You can monitor this behaviour with processexplorer.)
>> Any hints?
> 
> You must be doing something else.
> This app shows only one more handle after CreateFile.
> And it goes away after DeleteHandle.
> Do you have PE set to show all of the handle details?
> 
> #include	"windows.h"
> #include	<conio.h>
> 
> void pause(void)
> {	cputs( "\r\nCheck for number of handles, then press any key");
> 	getch();
> }
> 
> int main(void)
> {	HANDLE		h;
> 	DWORD		written;
> 	char		str[1024];
> 
> 	pause();
> 	h = CreateFile( "\\\\.\\PHYSICALDRIVE0",
>                          GENERIC_READ,
>                          FILE_SHARE_READ | FILE_SHARE_WRITE,
>                          NULL,
>                          OPEN_EXISTING,
>                          0,
>                          0);
> 	if(INVALID_HANDLE_VALUE!=h)
> 	{
> 		pause();
> 		SetFilePointer(h,0,NULL,FILE_BEGIN);
> 		pause();
> 		ReadFile(h,str,sizeof(str), &written,0);
> 		pause();
> 		CloseHandle(h);
> 		pause();
> 	};
> 	return 0;
> }
> 
> 

Using BDS 2007:
Just setup new VCL form application put button onto form and copy your 
code (except Pause function) to that button handler. During debug 
session Handle Count in PE increases by 2 at CreateFile and decreases by 
1 at CloseHandle

Installed trial version of TaskInfo (http://www.iarsn.com/taskinfo.html)
->
Handle Type            Refs Name
F78:   Device Obj      3/1  \Device\Harddisk0\DR0
F7C:   Obj Directory  11/2  \Sessions\0\DosDevices\00000000-00035ff2
F80:   Obj Directory  11/2  \Sessions\0\DosDevices\00000000-00035ff2

F78/f7c created be CreateFile
F80 not closed by previous  CreateFile/Closehandle!