I am learning Windows programming from Charles Petzold's Programming Windows 5th Edition. Well, I decided to take a look at www.winprog.org to take a look at the tutorial. Well, it seems to have contrasting code with Petzold. For instance
Code:
//Step 1: Registering the Window Class
wc.cbSize = sizeof(WNDCLASSEX);
wc.style = 0;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon(NULL, IDI_APPLICATION);
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = NULL;
wc.lpszClassName = g_szClassName;
wc.hIconSm = LoadIcon(NULL, IDI_APPLICATION);
Well, I never learned that last field of the Window class (wc.hIconSm). What is that?
Code:
// Step 4: the Window Procedure
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
switch(msg)
{
case WM_CLOSE:
DestroyWindow(hwnd);
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
default:
return DefWindowProc(hwnd, msg, wParam, lParam);
}
return 0;
}
And their WndProc, I didn't learn with the WM_CLOSE. What is that when you have WM_DESTROY? Does it just go to WM_DESTROY?
Thanks.
--Garfield the Great