C / C++ / MFC

#include <windows.h>
#include "resource.h"

bool g_run = true;

LRESULT CALLBACK About(HWND hDlg, UINT message, WPARAM wParam, LPARAM lParam)
{
	switch (message)
	{
	case WM_INITDIALOG:
		ShowWindow(hDlg,SW_SHOW);
		return TRUE;

	case WM_COMMAND:
		if (LOWORD(wParam) == IDOK || LOWORD(wParam) == IDCANCEL) 
		{
			g_run = false;
			EndDialog(hDlg, LOWORD(wParam));
			return TRUE;
		}
		break;
/*	default:
		return DefDlgProc(hDlg,message,wParam,lParam);
		break;
*/	}
	return FALSE;
}


int PASCAL WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow)
{
	HWND hwnd = CreateDialog(hInstance, (LPCTSTR)IDD_DIALOG1, NULL ,(DLGPROC)About);
	if (hwnd == NULL)
	{
		DWORD err = GetLastError();
	}

	while (g_run);

	return 0;
};