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Windows 95 API Bible
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chapte17
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mapvwofx.c
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C/C++ Source or Header
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1996-01-31
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8KB
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260 lines
#include <windows.h>
#include "MapVwOFX.h"
#if defined (WIN32)
#define IS_WIN32 TRUE
#else
#define IS_WIN32 FALSE
#endif
#define IS_NT IS_WIN32 && (BOOL)(GetVersion() < 0x80000000)
#define IS_WIN32S IS_WIN32 && (BOOL)(!(IS_NT) && (LOBYTE(LOWORD(GetVersion()))<4))
#define IS_WIN95 (BOOL)(!(IS_NT) && !(IS_WIN32S)) && IS_WIN32
HINSTANCE hInst; // current instance
LPCTSTR lpszAppName = "MyApp";
LPCTSTR lpszTitle = "My Application";
BOOL RegisterWin95( CONST WNDCLASS* lpwc );
int APIENTRY WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPTSTR lpCmdLine, int nCmdShow)
{
MSG msg;
HWND hWnd;
WNDCLASS wc;
// Register the main application window class.
//............................................
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = (WNDPROC)WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = LoadIcon( hInstance, lpszAppName );
wc.hCursor = LoadCursor(NULL, IDC_ARROW);
wc.hbrBackground = (HBRUSH)(COLOR_WINDOW+1);
wc.lpszMenuName = lpszAppName;
wc.lpszClassName = lpszAppName;
if ( IS_WIN95 )
{
if ( !RegisterWin95( &wc ) )
return( FALSE );
}
else if ( !RegisterClass( &wc ) )
return( FALSE );
hInst = hInstance;
// Create the main application window.
//....................................
hWnd = CreateWindow( lpszAppName,
lpszTitle,
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0,
CW_USEDEFAULT, 0,
NULL,
NULL,
hInstance,
NULL
);
if ( !hWnd )
return( FALSE );
ShowWindow( hWnd, nCmdShow );
UpdateWindow( hWnd );
while( GetMessage( &msg, NULL, 0, 0) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
return( msg.wParam );
}
BOOL RegisterWin95( CONST WNDCLASS* lpwc )
{
WNDCLASSEX wcex;
wcex.style = lpwc->style;
wcex.lpfnWndProc = lpwc->lpfnWndProc;
wcex.cbClsExtra = lpwc->cbClsExtra;
wcex.cbWndExtra = lpwc->cbWndExtra;
wcex.hInstance = lpwc->hInstance;
wcex.hIcon = lpwc->hIcon;
wcex.hCursor = lpwc->hCursor;
wcex.hbrBackground = lpwc->hbrBackground;
wcex.lpszMenuName = lpwc->lpszMenuName;
wcex.lpszClassName = lpwc->lpszClassName;
// Added elements for Windows 95.
//...............................
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.hIconSm = LoadImage(wcex.hInstance, lpwc->lpszClassName,
IMAGE_ICON, 16, 16,
LR_DEFAULTCOLOR );
return RegisterClassEx( &wcex );
}
DWORD AnotherProcess( LPDWORD lpdwParam )
{
HANDLE hFileMap;
LPTSTR lpMapAddress;
// Open the file mapping.
//.......................
hFileMap = OpenFileMapping( FILE_MAP_ALL_ACCESS, FALSE,
"MyFileMappingObject" );
// Map a view to the mapping object.
//..................................
lpMapAddress = MapViewOfFileEx( hFileMap, FILE_MAP_ALL_ACCESS,
0, 0, 0, lpdwParam);
// Display the contents of the memory.
//....................................
MessageBox( NULL, lpMapAddress, "Mapped Memmory",
MB_OK | MB_ICONINFORMATION );
// Set "Received" into the memory.
//................................
strcpy( lpMapAddress, "Received" );
UnmapViewOfFile( lpMapAddress );
return( 0 );
}
LRESULT CALLBACK WndProc( HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam )
{
static HANDLE hMapFile = NULL;
static HANDLE hThread = NULL;
static LPTSTR lpMapAddress = NULL;
switch( uMsg )
{
case WM_CREATE :
// Create a file mapped object.
//.............................
hMapFile = CreateFileMapping( (HANDLE)0xFFFFFFFF, NULL,
PAGE_READWRITE,
0,
1024,
"MyFileMappingObject" );
// Return if the mapping failed.
//..............................
if ( !hMapFile )
return(-1);
break;
case WM_TIMER :
// Check to see if the thread has processed the memory.
//.....................................................
if ( strcmp( lpMapAddress, "Received" ) == 0 )
{
// Kill the timer and thread.
//...........................
KillTimer( hWnd, 1 );
TerminateThread( hThread, 0 );
// Show the mapped data and unmap the view.
//.........................................
MessageBox( hWnd, lpMapAddress, "Done", MB_OK );
UnmapViewOfFile( lpMapAddress );
}
break;
case WM_COMMAND :
switch( LOWORD( wParam ) )
{
case IDM_TEST :
{
DWORD dwID;
// Map a view of the file mapped object.
//......................................
lpMapAddress = MapViewOfFile( hMapFile,
FILE_MAP_ALL_ACCESS,
0, 0, 0);
// Place data in the view.
//........................
strcpy( lpMapAddress,
"Data passed from main process." );
// Make sure the data is flushed to the file.
//...........................................
FlushViewOfFile( lpMapAddress,
lstrlen( lpMapAddress ) );
// Create a thread to receive the data.
//.....................................
hThread = CreateThread( NULL, 0,
(LPTHREAD_START_ROUTINE)AnotherProcess,
lpMapAddress, 0, &dwID );
// Set a timer to wait for the data to be processed.
//..................................................
SetTimer( hWnd, 1, 1000, NULL );
}
break;
case IDM_ABOUT :
DialogBox( hInst, "AboutBox", hWnd, (DLGPROC)About );
break;
case IDM_EXIT :
DestroyWindow( hWnd );
break;
}
break;
case WM_DESTROY :
CloseHandle( hMapFile );
PostQuitMessage(0);
break;
default :
return( DefWindowProc( hWnd, uMsg, wParam, lParam ) );
}
return( 0L );
}
LRESULT CALLBACK About( HWND hDlg,
UINT message,
WPARAM wParam,
LPARAM lParam)
{
switch (message)
{
case WM_INITDIALOG:
return (TRUE);
case WM_COMMAND:
if ( LOWORD(wParam) == IDOK
|| LOWORD(wParam) == IDCANCEL)
{
EndDialog(hDlg, TRUE);
return (TRUE);
}
break;
}
return (FALSE);
}