Do not confuse this with cbClsExtra, which is common to all instances.
SERVIIO CONSOLE IS NOT A VALID WIN32 APPLICATION WINDOWS
The window procedure is a function that handles events for all windows that are instances of this window class. It stores the address of the window procedure. lpfnWndProc: This is one of the more important fields.cbSize: The size, in bytes, of the structure.
The first act of WinMain is to fill in the window class structure, WNDCLASSEX wc. A window class is identified by a window class name, which is given in the CLSNAME global variable in this example. This describes information about a window that is to be shared between instances of it, like the icon, the cursor, and others. A new header is included: contains the declaration of TCHAR.Ī window consists of what is known as a window class. The generic character type for Win32 strings is TCHAR, whose definition depends on whether or not UNICODE is defined. As a result, all string literals must be wrapped in a TEXT( macro. These macros cause our program to understand wide character strings ( wchar_t), not plain narrow strings( char). The first thing one sees are the two macro definitions, UNICODE and _UNICODE. LRESULT CALLBACK winproc(HWND hwnd, UINT wm, WPARAM wp, LPARAM lp) MessageBox(NULL, TEXT("Could not create window"), NULL, MB_ICONERROR) MessageBox(NULL, TEXT("Could not register window class"), Wc.hIconSm = LoadIcon (NULL, IDI_APPLICATION) Wc.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) Wc.hCursor = LoadCursor (NULL, IDC_ARROW) Wc.hIcon = LoadIcon (NULL, IDI_APPLICATION)
Int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, PTSTR cmdline, Const TCHAR CLSNAME = TEXT("helloworldWClass")
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