Notes

#include <windows.h>

// Global variable

HINSTANCE hinst;

// Function prototypes.

int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int);
InitApplication(HINSTANCE);
InitInstance(HINSTANCE, int);
LRESULT CALLBACK MainWndProc(HWND, UINT, WPARAM, LPARAM);

// Application entry point.

int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevInstance,
LPSTR lpCmdLine, int nCmdShow)
{
MSG msg;

if (!InitApplication(hinstance))
return FALSE;

if (!InitInstance(hinstance, nCmdShow))
return FALSE;

BOOL fGotMessage;
while ((fGotMessage = GetMessage(&msg, (HWND) NULL, 0, 0)) != 0 && fGotMessage != -1)
{
TranslateMessage(&msg);
DispatchMessage(&msg);
}
return msg.wParam;
UNREFERENCED_PARAMETER(lpCmdLine);
}

BOOL InitApplication(HINSTANCE hinstance)
{
WNDCLASSEX wcx;

// Fill in the window class structure with parameters
// that describe the main window.

wcx.cbSize = sizeof(wcx); // size of structure
wcx.style = CS_HREDRAW |
CS_VREDRAW; // redraw if size changes
wcx.lpfnWndProc = MainWndProc; // points to window procedure
wcx.cbClsExtra = 0; // no extra class memory
wcx.cbWndExtra = 0; // no extra window memory
wcx.hInstance = hinstance; // handle to instance
wcx.hIcon = LoadIcon(NULL,
IDI_APPLICATION); // predefined app. icon
wcx.hCursor = LoadCursor(NULL,
IDC_ARROW); // predefined arrow
wcx.hbrBackground = GetStockObject(
WHITE_BRUSH); // white background brush
wcx.lpszMenuName = "MainMenu"; // name of menu resource
wcx.lpszClassName = "MainWClass"; // name of window class
wcx.hIconSm = LoadImage(hinstance, // small class icon
MAKEINTRESOURCE(5),
IMAGE_ICON,
GetSystemMetrics(SM_CXSMICON),
GetSystemMetrics(SM_CYSMICON),
LR_DEFAULTCOLOR);

// Register the window class.

return RegisterClassEx(&wcx);
}

BOOL InitInstance(HINSTANCE hinstance, int nCmdShow)
{
HWND hwnd;

// Save the application-instance handle.

hinst = hinstance;

// Create the main window.

hwnd = CreateWindow(
"MainWClass", // name of window class
"Sample", // title-bar string
WS_OVERLAPPEDWINDOW, // top-level window
CW_USEDEFAULT, // default horizontal position
CW_USEDEFAULT, // default vertical position
CW_USEDEFAULT, // default width
CW_USEDEFAULT, // default height
(HWND) NULL, // no owner window
(HMENU) NULL, // use class menu
hinstance, // handle to application instance
(LPVOID) NULL); // no window-creation data

if (!hwnd)
return FALSE;

// Show the window and send a WM_PAINT message to the window
// procedure.

ShowWindow(hwnd, nCmdShow);
UpdateWindow(hwnd);
return TRUE;

}