#include <windows.h>

HINSTANCE hInst;

LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wparam, LPARAM lparam)
{
	static HWND hLeftLabel, hCenterLabel, hRightLabel, hSimpleLabel;
	static HWND hLeftText, hCenterText, hRightText, hSimpleText;;
	static int cxChar, cyChar;
	int width;

    switch (msg) {
    case WM_CREATE:
        hLeftLabel = CreateWindowEx(0, "STATIC", "Left aligned",
		WS_CHILD | WS_VISIBLE | SS_LEFT,
		0, 0, 0, 0, hwnd, (HMENU) -1, hInst, NULL);

        hCenterLabel = CreateWindowEx(0, "STATIC", "Center aligned",
		WS_CHILD | WS_VISIBLE | SS_LEFT,
		0, 0, 0, 0, hwnd, (HMENU) -1, hInst, NULL);

        hRightLabel = CreateWindowEx(0, "STATIC", "Right aligned",
		WS_CHILD | WS_VISIBLE | SS_LEFT,
		0, 0, 0, 0, hwnd, (HMENU) -1, hInst, NULL);

        hSimpleLabel = CreateWindowEx(0, "STATIC", "Simple aligned",
		WS_CHILD | WS_VISIBLE | SS_SIMPLE,
		0, 0, 0, 0, hwnd, (HMENU) -1, hInst, NULL);

        hLeftText = CreateWindowEx(0, "STATIC", "Left aligned",
		WS_CHILD | WS_VISIBLE | SS_LEFT,
		0, 0, 0, 0, hwnd, (HMENU) -1, hInst, NULL);

        hCenterText = CreateWindowEx(0, "STATIC", "Center aligned",
		WS_CHILD | WS_VISIBLE | SS_CENTER,
		0, 0, 0, 0, hwnd, (HMENU) -1, hInst, NULL);

        hRightText = CreateWindowEx(0, "STATIC", "Right aligned",
		WS_CHILD | WS_VISIBLE | SS_RIGHT,
		0, 0, 0, 0, hwnd, (HMENU) -1, hInst, NULL);

        hSimpleText = CreateWindowEx(0, "STATIC", "Simple aligned",
		WS_CHILD | WS_VISIBLE | SS_SIMPLE,
		0, 0, 0, 0, hwnd, (HMENU) -1, hInst, NULL);

	cxChar = cyChar = -1;

	break;
    case WM_SIZE:
	width = LOWORD(lparam);
	if (cxChar == -1) {
		HDC hdc = GetDC(hwnd);
		TEXTMETRIC tm;
		GetTextMetrics(hdc, &tm);
		cxChar = tm.tmAveCharWidth;
		cyChar = tm.tmHeight + tm.tmExternalLeading;
		ReleaseDC(hwnd, hdc);
	}
	MoveWindow(hLeftLabel, cxChar, 0, cxChar*20, cyChar, TRUE);
	MoveWindow(hCenterLabel, cxChar, cyChar*4, cxChar*20, cyChar, TRUE);
	MoveWindow(hRightLabel, cxChar, cyChar*8, cxChar*20, cyChar, TRUE);
	MoveWindow(hSimpleLabel, cxChar, cyChar*12, cxChar*20, cyChar, TRUE);
	MoveWindow(hLeftText, width/2, 0, cxChar*8, cyChar, TRUE);
	MoveWindow(hCenterText, width/2, cyChar*4, cxChar*8, cyChar, TRUE);
	MoveWindow(hRightText, width/2, cyChar*8, cxChar*8, cyChar, TRUE);
	MoveWindow(hSimpleText, width/2, cyChar*12, cxChar*8, cyChar, TRUE);
        break;
    case WM_DESTROY:
        PostQuitMessage(0);
        return 0;
    }
    return DefWindowProc(hwnd, msg, wparam, lparam);
}

int WINAPI WinMain(HINSTANCE instance, HINSTANCE prev, LPSTR cmdLine, int cmdShow)
{
    WNDCLASSEX class;
    MSG msg;
    HWND window;

    /* this stuff is just boilerplate */
    memset(&class, 0, sizeof(WNDCLASSEX));
    class.cbSize = sizeof(WNDCLASSEX);
    class.hInstance = instance;
    class.lpszClassName = "MainWnd";
    class.lpfnWndProc = WndProc;
    class.hbrBackground = (HBRUSH) COLOR_WINDOW ;

    if (!RegisterClassEx(&class)) {
        MessageBox(NULL, "Could not register window class", "", MB_OK | MB_ICONERROR);
        return 1;
    }

    window = CreateWindowEx(0, "MainWnd", "Main Window", WS_OVERLAPPEDWINDOW & ~WS_MAXIMIZEBOX,
                            CW_USEDEFAULT, CW_USEDEFAULT, 400, 400, NULL, NULL, instance, NULL);
    ShowWindow(window, cmdShow);

    /* Every thread that creates a window must pump the message loop */
    while (GetMessage(&msg, NULL, 0, 0)) {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    
    return 0;
}