Ticker

Ticker

#include <windows.h>
#include <tchar.h>
#include <time.h>

LRESULT CALLBACK WindowProc(HWND, UINT, WPARAM, LPARAM);
VOID CALLBACK TimerProc(HWND hwnd, UINT uMsg, UINT_PTR idEvent, DWORD dwTime);

int WINAPI WinMain(HINSTANCE hInst, HINSTANCE hPrevInst, LPSTR lpszCmdLine, int nCmdShow)
{
	TCHAR szClassWindow[] = L"Win32Application";
	TCHAR szWindowCaption[45] = L"Exsample of the ticker in WinAPI            ";
	int screenWidth = GetSystemMetrics(SM_CXSCREEN);
	int screenHeight = GetSystemMetrics(SM_CYSCREEN);

	HWND hWnd;
	MSG lpMsg;
	WNDCLASSEX wcl;
	wcl.cbSize = sizeof(wcl);
	wcl.style = CS_HREDRAW | CS_VREDRAW;
	wcl.lpfnWndProc = WindowProc;
	wcl.cbClsExtra = 0;
	wcl.cbWndExtra = 0;
	wcl.hInstance = hInst;
	wcl.hIcon = LoadIcon(NULL, IDI_APPLICATION);
	wcl.hCursor = LoadCursor(NULL, IDC_ARROW);
	wcl.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	wcl.lpszMenuName = NULL;
	wcl.lpszClassName = szClassWindow;
	wcl.hIconSm = NULL;
	if (!RegisterClassEx(&wcl))
		return 0;
	hWnd = CreateWindowEx(0, szClassWindow, szWindowCaption, WS_POPUPWINDOW | WS_CAPTION,
		screenWidth / 2 - 100, screenHeight / 2 - 100, 320, 100, NULL, NULL, hInst, NULL);
	ShowWindow(hWnd, nCmdShow);
	UpdateWindow(hWnd);

	SetTimer(hWnd, 1, 200, TimerProc);

	while (GetMessage(&lpMsg, NULL, 0, 0))
	{
		TranslateMessage(&lpMsg);
		DispatchMessage(&lpMsg);
	}
	return lpMsg.wParam;
}

VOID CALLBACK TimerProc(HWND hwnd, UINT uMsg, UINT_PTR idEvent, DWORD dwTime)
{
	TCHAR szWindowCaption[45];
	TCHAR szBuffer[45];

	GetWindowText(hwnd, szWindowCaption, 45);
	szBuffer[0] = szWindowCaption[38];

	for (int i = 0; i < 43; i++)
		szBuffer[i + 1] = szWindowCaption[i];

	szBuffer[44] = NULL;

	SetWindowText(hwnd, szBuffer);
}

LRESULT CALLBACK WindowProc(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;
}