Pointer

[kamshin 0]

kadang2 tertnya gak dlm benak ni....apa gunanya pointer ek?setakat y saya tahu, pointer ni untk pertukaran address n y berkaitan dgnnya...apa gunanya dlm system y kita buat????

[Stranger 0]

klu ko pnh gune _beginthreadex() API, 4th parameter 2 ko leh pass argument lists yg function ko require...

eg: Ni function yg kte nk forward kt _beginthreadex()

void GetAvailableDrives (HWND hTreeView, HWND hToolBar, HWND hStatusBar, HWND hProgressBar, HMENU hMenu);

Ni user-defined structure...

typedef struct tagTHREADPARAM{
	HWND  hTreeView;
	HWND  hToolBar;
	HWND  hStatusBar;
	HWND  hProgressBar;
	HMENU hMenu;
}THREADPARAM, *LPTHREADPARAM;
[/codebox]

Ni function utk _beginthreadex() 3rd parameter

[codebox]

unsigned int __stdcall SpawnThread (LPVOID lpArgLists)
{
GetAvailableDrives (((LPTHREADPARAM)lpArgLists)->hTreeView,
((LPTHREADPARAM)lpArgLists)->hToolBar,
((LPTHREADPARAM)lpArgLists)->hStatusBar,
((LPTHREADPARAM)lpArgLists)->hProgressBar,
((LPTHREADPARAM)lpArgLists)->hMenu);

_endthreadex (0);
return 0;
}

so ngn pointer nih, kte leh pass sume HWND & HMENU kt _beginthreadex() ngn :

........


THREADPARAM    ThreadParam;
DWORD          ThreadID;
HANDLE	       hThread;

hThread = (HANDLE) _beginthreadex (NULL, 0, &SpawnThread, (LPVOID)&ThreadParam, 0, &ThreadID);
[/codebox]

Edited January 26, 2007 by Stranger

[Paralys3r 0]

kalau awak boleh jawab soalan untuk "apa gunanya alamat rumah?", awak bolehlah dapatkan jawapan untuk soalan "apa gunanya pointer?".

[kamshin 0]

Oooo...Cam 2 ke...X pernh guna g bend cam 2..maklum r org baru dlm C++...Hehe..Mintak tunjuk ajar ckit kat korang leh x?Semua coding 2 leh letk dlm software C++ x?

Edited January 27, 2007 by kamshin