Menus again...

[CyberCarsten]

This code comes from a C++ book I'm currently reading, and it should show a menu....but it doesn't
The .EXE file that is on the cd accompanied with the book uses this code, and it works fine...what is wrong???

// PROG6_2.CPP - basic menus

// INCLUDES ///////////////////////////////////////////////
#define WIN32_LEAN_AND_MEAN  

#include <windows.h>  
#include <windowsx.h> 
#include <winuser.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "mymenu.h"

// DEFINES ////////////////////////////////////////////////

// defines for windows 
#define WINDOW_CLASS_NAME "WINCLASS1"
#define WINDOW_WIDTH  320
#define WINDOW_HEIGHT 200

// GLOBALS ////////////////////////////////////////////////
HWND main_window_handle = NULL; // save the window handle
char buffer[80];                // used to print text

// FUNCTIONS //////////////////////////////////////////////
LRESULT CALLBACK WindowProc(HWND hwnd, 
						    UINT msg, 
                            WPARAM wparam, 
                            LPARAM lparam)
{
// this is the main message handler of the system
PAINTSTRUCT	ps;		   // used in WM_PAINT
HDC			hdc;	   // handle to a device context

// what is the message 
switch(msg)
	{	
	case WM_CREATE: 
        {
		// do initialization stuff here
		return(0);
		} break;

    // process menu messages
    case WM_COMMAND:
         {
         // get the dc
         hdc = GetDC(hwnd);

         // set the color
         SetTextColor(hdc,RGB(0,0,255));
         SetBkColor(hdc,RGB(0,0,0));
         SetBkMode(hdc,OPAQUE);

         // what menu item?
         switch(wparam)
               {
               case ID_MYMENU_FILE_OPEN: 
                    {
                    // print message
                    TextOut(hdc,0,100,"File->Open     ",strlen("File->Open     "));
                    } break;
               case ID_MYMENU_FILE_CLOSE:  
                    {
                    // print message
                    TextOut(hdc,0,100,"File->Close     ",strlen("File->Close     "));
                    } break;
               case ID_MYMENU_FILE_EXIT:   
                    { 
                    // terminate the application
                    PostMessage(hwnd,WM_DESTROY,0,0);
                    } break;
               case ID_MYMENU_HELP_ABOUT:
                    {
                    // print message
                    TextOut(hdc,0,100,"Help->About     ",strlen("Help->About     "));    
                    
                    // put up a message box
                    MessageBox(hwnd,"Poor Man's About","About Menus",MB_OK);

                    } break;
           
               default: break;
               } // end switch

         // release the dc
         ReleaseDC(hwnd,hdc);

         // inform windows we handled message
         return(0);
         } break;

    case WM_PAINT:
         {
         // start painting
         hdc = BeginPaint(hwnd,&ps);

         // end painting
         EndPaint(hwnd,&ps);
         return(0);
        } break;

	case WM_DESTROY: 
		{
		// kill the application			
		PostQuitMessage(0);
		return(0);
		} break;

	default:break;

    } // end switch

// process any messages that we didn't take care of 
return (DefWindowProc(hwnd, msg, wparam, lparam));

} // end WinProc

// WINMAIN ////////////////////////////////////////////////
int WINAPI WinMain(	HINSTANCE hinstance,
					HINSTANCE hprevinstance,
					LPSTR lpcmdline,
					int ncmdshow)
{

WNDCLASS winclass;	// this will hold the class we create
HWND	 hwnd;		// generic window handle
MSG		 msg;		// generic message
HDC      hdc;       // generic dc
PAINTSTRUCT ps;     // generic paintstruct

// first fill in the window class stucture
winclass.style			= CS_DBLCLKS | CS_OWNDC | 
                          CS_HREDRAW | CS_VREDRAW;
winclass.lpfnWndProc	= WindowProc;
winclass.cbClsExtra		= 0;
winclass.cbWndExtra		= 0;
winclass.hInstance		= hinstance;
winclass.hIcon			= LoadIcon(NULL, IDI_APPLICATION);
winclass.hCursor		= LoadCursor(NULL, IDC_ARROW);
winclass.hbrBackground	= GetStockObject(BLACK_BRUSH);
winclass.lpszMenuName	= NULL; 
winclass.lpszClassName	= WINDOW_CLASS_NAME;

// register the window class
if (!RegisterClass(&winclass))
	return(0);

// create the window
if (!(hwnd = CreateWindow(WINDOW_CLASS_NAME, // class
						  "Basic Menus",	 // title
						  WS_OVERLAPPEDWINDOW | WS_VISIBLE,
					 	  0,0,	   // x,y
						  WINDOW_WIDTH,  // width
                          WINDOW_HEIGHT, // height
						  NULL,	   // handle to parent 
						  NULL,	   // handle to menu
						  hinstance,// instance
						  NULL)))	// creation parms
return(0);

// save the window handle in a global
main_window_handle = hwnd;

// load the menu in and attach it (method 3)
SetMenu(hwnd,LoadMenu(hinstance, "MYMENU"));

// enter main event loop
while(1)
	{
	if (PeekMessage(&msg,NULL,0,0,PM_REMOVE))
		{ 
		// test if this is a quit
        if (msg.message == WM_QUIT)
           break;
	
		// translate any accelerator keys
		TranslateMessage(&msg);

		// send the message to the window proc
		DispatchMessage(&msg);
		} // end if
    
    // main game processing goes here

	} // end while

// return to Windows like this
return(msg.wParam);

} // end WinMain

///////////////////////////////////////////////////////////