/**
 * SimpleWindow v1.0
 * @file
 *
 * 09-24-2008:  JPH - Created.
 *
 * @author Jacob Hammack
 */
 
#include <windows.h>
 
/**
 * Forces the compiler to link these libraries
 *
 */
#pragma comment(lib, "user32.lib")
#pragma comment(lib, "gdi32.lib")
#pragma comment(lib, "kernel32.lib")
 
/**
 * WindowsMessageLoop processes 
 *
 * @author Jacob Hammack
 */
LRESULT CALLBACK WindowsMessageLoop(HWND WindowHandle, UINT Message, WPARAM WindowParameters, LPARAM MoreWindowsParameters)
{
  switch(Message)
  {
    case WM_CREATE:
      return 0;
 
    case WM_PAINT:
      return 0;
 
    case WM_SIZE:
      return 0;
 
    case WM_DESTROY:
      PostQuitMessage(0);
      return 0;
  }
 
  return DefWindowProc(WindowHandle, Message, WindowParameters, MoreWindowsParameters);
}
 
/**
 * WinMain is the main() equivilent for a windows program, execution starts here.
 *
 * @author Jacob Hammack
 */
int WINAPI WinMain (HINSTANCE CurrentInstance, HINSTANCE PreviousInstance,  PSTR CommandLine, int CommandShow)
{
  static TCHAR ApplicationName[] = TEXT("SimpleWindow");
  HWND WindowHandle;
  MSG Message;
  WNDCLASS WindowsClass;
 
  WindowsClass.style = CS_HREDRAW | CS_VREDRAW;
  WindowsClass.lpfnWndProc = WindowsMessageLoop;
  WindowsClass.cbClsExtra = 0;
  WindowsClass.cbWndExtra = 0;
  WindowsClass.hInstance = CurrentInstance;
  WindowsClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
  WindowsClass.hCursor = LoadCursor(NULL, IDC_ARROW);
  WindowsClass.hbrBackground = (HBRUSH) GetStockObject(WHITE_BRUSH);
  WindowsClass.lpszMenuName = NULL;
  WindowsClass.lpszClassName = ApplicationName;
 
  if(!RegisterClass(&WindowsClass))
  {
    MessageBox(NULL, TEXT("Unable to create a window."), ApplicationName, MB_ICONERROR);
 
    return 0;
  }
 
    WindowHandle = CreateWindow(ApplicationName,        /* Window Class Name*/
                                TEXT("Simple Window"),  /* Window Caption */
                                WS_OVERLAPPEDWINDOW,    /* Window Style*/
                                CW_USEDEFAULT,          /* Initial X position*/
                                CW_USEDEFAULT,          /* Initial Y position */
                                300,                    /* Initial Width of the window*/
                                100,                    /* Initial Height of the window */
                                NULL,                   /* Parent Window Handle */
                                NULL,                   /* Window Menu Handle */
                                CurrentInstance,        /* Instance of the Program Handle*/
                                NULL);                  /* Window Creation Parameters */
 
  ShowWindow(WindowHandle, CommandShow);
  UpdateWindow(WindowHandle);
 
  while(GetMessage(&Message, NULL, 0, 0))
  {
    TranslateMessage(&Message);
    DispatchMessage(&Message);
  }
 
  return Message.wParam;
}

Makefile
CC=cl
CFLAGS= /nologo /MT /O2 /TC
LINKS=/link /OUT:simplewindow.exe /SUBSYSTEM:WINDOWS
 
all: simplewindow 
 
simplewindow: simplewindow.c
  $(CC) $(CFLAGS) simplewindow.c $(LINKS)
 
clean:
  del *.exe; del *.obj