dev-cpp-users

[Damien A <g_...@ho...>]

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<DIV></DIV>&gt;From: "Noorez Kassam" <COO...@HO...>
<DIV></DIV>&gt;To: dev...@li... 
<DIV></DIV>&gt;Subject: [Dev-C++] WinAPP 
<DIV></DIV>&gt;Date: Wed, 24 Dec 2003 14:11:53 -0700 
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<DIV></DIV>&gt;My windows APP is closing before i see any results! It complies fine 
<DIV></DIV>&gt;but it just closes 
<DIV></DIV>&gt; 
<DIV></DIV>
<DIV></DIV>&gt; WNDCLASSEX wndClass; 
<DIV></DIV>&gt; 
<DIV></DIV>&gt; //register class 
<DIV></DIV>&gt; wndClass.style = 0; 
<DIV></DIV>&gt; wndClass.lpfnWndProc = WindowProc; 
<DIV></DIV>&gt; wndClass. cbClsExtra = 0; 
<DIV></DIV>&gt; wndClass.hInstance = hInstance; 
<DIV></DIV>&gt; wndClass.hIcon = LoadIcon( hInstance, szAppName); 
<DIV></DIV>&gt; wndClass.hCursor = LoadCursor(NULL, IDC_ARROW); 
<DIV></DIV>&gt; wndClass.hbrBackground = (HBRUSH) COLOR_BACKGROUND; 
<DIV></DIV>&gt; wndClass.lpszMenuName = NULL; 
<DIV></DIV>&gt; wndClass.lpszClassName = szAppName; 
<DIV></DIV>&gt; wndClass.hIconSm = wndClass.hIcon; 
<DIV></DIV>&gt; 
<DIV></DIV>
<DIV></DIV>
<P>Hmm, do you have a resource file that actually has the specified icon? But anyways, the reason your app fails is because RegisterClassEx returns 0.&nbsp; The reason for this prolly were:&nbsp;cbWndExtra was not initialized, and more importantly: cbSize was not initialized/set to the size of the WNDCLASSEX structure.&nbsp; </P>
<P>I changed your code to this:</P>
<P>WNDCLASSEX wndClass = {0}; </P>
<P>//register class <BR>wndClass.style = CS_OWNDC;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; // A habit&nbsp;I picked up from OpenGL<BR>wndClass.lpfnWndProc = WindowProc; </P>
<P>wndClass.hInstance = hInstance; <BR>wndClass.hIcon = LoadIcon( NULL, IDI_WINLOGO); //A standard windows icon<BR>wndClass.hCursor = LoadCursor(NULL, IDC_ARROW); <BR>wndClass.hbrBackground = (HBRUSH) COLOR_BACKGROUND; <BR>wndClass.lpszMenuName = NULL; <BR>wndClass.lpszClassName = szAppName; <BR>wndClass.hIconSm = wndClass.hIcon; <BR>wndClass.cbSize = sizeof(WNDCLASSEX);&nbsp;&nbsp;&nbsp; //Important field</P>
<P>and it worked ;).</P>
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