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POWindows API Programming
 

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  1. POWindows API Programming
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    <p>Its me Vijay..</p> <p>I m Trying to make a CrossHair(some kind of cursor) On The Screen while running a Game (Counter Strike)...</p> <p>so i did this...</p> <pre><code>############################# </code></pre> <p><code>#include&lt;iostream.h&gt;</code><br> <code>#include&lt;windows.h&gt;</code><br> <code>#include&lt;conio.h&gt;</code><br> <code>#include&lt;dos.h&gt;</code><br> <code>#include&lt;stdlib.h&gt;</code><br> <code>#include&lt;process.h&gt;</code><br> <code>#include &lt;time.h&gt;</code><br> int main()<br> {<br> <code>HANDLE hl = OpenProcess(PROCESS_ALL_ACCESS,TRUE,pid);</code> // Here pid is the process ID of the Game...<br> <code>HDC hDC = GetDC(NULL);</code> //Here i pass NULL for Entire Screen...<br> <code>HBRUSH hb=CreateSolidBrush(RGB(0,255,255));</code> <code>SelectObject(hDC,hb);</code> <code>POINT p;</code> <code>while(!kbhit())</code><br> {<br> <code>int x=1360/2,y=768/2;</code><br> <code>MoveToEx(hDC,x-20,y,&amp;p);</code><br> <code>LineTo(hDC,x+20,y);</code> </p> <pre><code> SetPixel(hDC,x,y,RGB(255,0,0)); SetPixel(hDC,x-1,y-1,RGB(255,0,0)); SetPixel(hDC,x-1,y+1,RGB(255,0,0)); SetPixel(hDC,x+1,y+1,RGB(255,0,0)); SetPixel(hDC,x+1,y-1,RGB(255,0,0)); MoveToEx(hDC,x,y-20,&amp;p); LineTo(hDC,x,y+20); } cin.get(); return 0; </code></pre> <p>} <code>####################################</code></p> <p>it works fine....at desktop i see crosshair...but my problem is that when i run game...the cross here got disappeared....</p> <p>so i think i did not handle the process of game...</p> <p>so i pass the HANDLE to the GetDC(hl)...</p> <p>But GetDC take only HWND(Handle To Window)...</p> <p>so i typecast it like this...</p> <p>HWND hl = (HWND)OpenProcess(PROCESS_ALL_ACCESS,TRUE,pid);</p> <p>and passed hl to the GetDC(hl)...</p> <p>but it doesnt work...Whats wrong with the code...</p> <p>plz tell me how do i make a simple shape at the screen on a process or game...</p> <p>PS : (My Compiler Is DevCPP and OS WinXP SP3....)</p>
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    1. COI don't know for the rest, but keep in mind that trying to transform a HANDLE in an HWND with a cast is one of the wrongest thing you could do. HWNDs refer to windows and are handled by the window manager, while HANDLEs refer to *kernel objects* (which are *completely different beasts*) and are handled by the object manager. So, they are completely unrelated, you can think at them as pointers to completely unrelated classes. Don't try to do that cast again or the computer police will arrest you and sentence you to death.
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    2. COgr8....... i wouldnt know that...by typcasting i can go to jail...
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    3. COOnly if you use casts to commit murders, like converting incompatible handle/pointer types or using them just to shut up the compiler. In that case the compiler is allowed to blow up your PC, see §5.4.28 of the C++ standard.
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