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/********************************************************************\

*  generic.c: Source code for generic                                *

*                                                                    *

*  Comments: Generic Application                                     *

*                                                                    *

*  Functions:                                                        *

*     WinMain      - Application entry point                         *

*     MainWndProc  - main window procedure                           *

*     AboutDlgProc - dialog procedure for About dialog               *

*                                                                    *

*                                                                    *

\********************************************************************/


/*********************  Header Files  *********************/


#include <windows.h>

#include "generic.h"

#pragma comment(lib, "user32.lib")

#pragma comment(lib, "gdi32.lib")


/*********************  Prototypes  ***********************/


LRESULT CALLBACK MainWndProc( HWND, UINT, WPARAM, LPARAM );

INT_PTR CALLBACK AboutDlgProc( HWND, UINT, WPARAM, LPARAM );


/*******************  Global Variables ********************/


HINSTANCE ghInstance;


/********************************************************************\

*  Function: int CALLBACK WinMain(HINSTANCE, HINSTANCE, LPSTR, int)  *

*                                                                    *

*   Purpose: Initializes Application                                 *

*                                                                    *

*  Comments: Register window class, create and display the main      *

*            window, and enter message loop.                         *

*                                                                    *

*                                                                    *

\********************************************************************/


int CALLBACK WinMain( HINSTANCE hInstance,

    HINSTANCE hPrevInstance,

    LPSTR lpszCmdLine,

    int nCmdShow )

{

   MSG msg;

   HWND hWnd;

   BOOL bRet;

   WNDCLASS wc;


   if( !hPrevInstance )

   {

      wc.lpszClassName = TEXT("GenericAppClass");

      wc.lpfnWndProc = MainWndProc;

      wc.style = CS_OWNDC | CS_VREDRAW | CS_HREDRAW;

      wc.hInstance = hInstance;

      wc.hIcon = LoadIcon( NULL, IDI_APPLICATION );

      wc.hCursor = LoadCursor( NULL, IDC_ARROW );

      wc.hbrBackground = (HBRUSH)( COLOR_WINDOW+1 );

      wc.lpszMenuName = TEXT("GenericAppMenu");

      wc.cbClsExtra = 0;

      wc.cbWndExtra = 0;


      RegisterClass( &wc );

   }


   ghInstance = hInstance;


   hWnd = CreateWindow( TEXT("GenericAppClass"),

      TEXT("Generic Application"),

      WS_OVERLAPPEDWINDOW|WS_HSCROLL|WS_VSCROLL,

      0,

      0,

      CW_USEDEFAULT,

      CW_USEDEFAULT,

      NULL,

      NULL,

      hInstance,

      NULL

   );


   ShowWindow( hWnd, nCmdShow );


   while( (bRet = GetMessage( &msg, NULL, 0, 0 )) != 0 ) 
   {

      if (bRet == -1)

      {

         // handle the error and possibly exit

      }

      else

      {

         TranslateMessage( &msg );

         DispatchMessage( &msg );

      }

   }


   return (int)msg.wParam;

}


/********************************************************************\

* Function: LRESULT CALLBACK MainWndProc(HWND, UINT, WPARAM, LPARAM) *

*                                                                    *

*  Purpose: Processes Application Messages                           *

*                                                                    *

* Comments: The following messages are processed                     *

*                                                                    *

*           WM_PAINT                                                 *

*           WM_COMMAND                                               *

*           WM_DESTROY                                               *

*                                                                    *

*                                                                    *

\********************************************************************/


LRESULT CALLBACK MainWndProc( 
   HWND hWnd, 
   UINT msg, 
   WPARAM wParam,

   LPARAM lParam )

{

   PAINTSTRUCT ps;

   HDC hDC;


   switch( msg ) 
   {


/**************************************************************\

*     WM_PAINT:                                                *

\**************************************************************/


      case WM_PAINT:

         hDC = BeginPaint( hWnd, &ps );


         TextOut( hDC, 10, 10, TEXT("Hello, Windows!"), 15 );


         EndPaint( hWnd, &ps );

         break;


/**************************************************************\

*     WM_COMMAND:                                              *

\**************************************************************/


      case WM_COMMAND:

        switch( wParam ) 
        {

            case IDM_ABOUT:

               DialogBox( ghInstance, TEXT("AboutDlg"), hWnd, 
                          (DLGPROC) AboutDlgProc );

            break;

         }

        break;


/**************************************************************\

*     WM_DESTROY: PostQuitMessage() is called                  *

\**************************************************************/


      case WM_DESTROY:

         PostQuitMessage( 0 );

         break;


/**************************************************************\

*     Let the default window proc handle all other messages    *

\**************************************************************/


      default:

         return( DefWindowProc( hWnd, msg, wParam, lParam ));

   }


   return 0;

}


/********************************************************************\

* Function: INT_PTR CALLBACK AboutDlgProc(HWND, UINT, WPARAM, LPARAM)*

*                                                                    *

*  Purpose: Processes "About" Dialog Box Messages                    *

*                                                                    *

* Comments: The About dialog box is displayed when the user clicks   *

*           About from the Help menu.                                *

*                                                                    *

\********************************************************************/


INT_PTR CALLBACK AboutDlgProc( 
   HWND hDlg, 
   UINT uMsg, 
   WPARAM wParam, 
   LPARAM lParam )

{

   switch( uMsg ) 
   {

      case WM_INITDIALOG:

         return TRUE;

      case WM_COMMAND:

         switch( wParam ) 
         {

            case IDOK:

               EndDialog( hDlg, TRUE );

               return TRUE;

         }

      break;

   }


   return FALSE;

}