Create Win32 window

Main.c

#include <windows.h>

LRESULT CALLBACK WndProc(HWND hWnd, UINT Message, WPARAM wParam, LPARAM lParam) {
	switch (Message) {
	case WM_DESTROY: {
		PostQuitMessage(0);
		break;
	}
	default:
		return DefWindowProc(hWnd, Message, wParam, lParam);
	}
	return 0;
}

int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR pCmdLine, int nCmdShow) {
	// Register window class
	WNDCLASSEXW wc;
	wc.cbSize = sizeof(WNDCLASSEXW);
	wc.hInstance = hInstance;
	wc.lpszClassName = L"Window Class";
	wc.lpfnWndProc = WndProc;
	wc.hIcon = LoadIconW(NULL, MAKEINTRESOURCEW(32512));
	wc.hIconSm = LoadIconW(NULL, MAKEINTRESOURCEW(32512));
	wc.hCursor = LoadCursorW(NULL, MAKEINTRESOURCEW(32512));
	wc.lpszMenuName = NULL;
	wc.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
	wc.cbClsExtra = 0;
	wc.cbWndExtra = 0;
	if (!RegisterClassExW(&wc)) {
		MessageBoxW(NULL, L"Window registration failed.", L"Error", MB_ICONERROR | MB_OK);
		return 0;
	}

	// Create window
	HWND hWnd = CreateWindowExW(
		WS_EX_OVERLAPPEDWINDOW, wc.lpszClassName, L"Window Title π ≈ 3.14", WS_OVERLAPPEDWINDOW,
		CW_USEDEFAULT, CW_USEDEFAULT, 400, 300,
		NULL, NULL, hInstance, NULL
	);
	if (hWnd == NULL) {
		MessageBoxW(NULL, L"Window creation failed.", L"Error", MB_ICONERROR | MB_OK);
		return 0;
	}

	// Show window
	ShowWindow(hWnd, nCmdShow);
	UpdateWindow(hWnd);

	// Start message loop
	MSG msg;
	while (GetMessageW(&msg, NULL, 0, 0) > 0) {
		TranslateMessage(&msg);
		DispatchMessageW(&msg);
	}
	return msg.wParam;
}

VS settings:

• Save source file as "Unicode - Codepage 1200" if there are Unicode characters in the code.
• Advanced > Character Set: Use Unicode Character Set
• C/C++ > Advanced > Disable Specific Warnings: 28251
• Linker > System > SubSystem: Windows (/SUBSYSTEM: WINDOWS)