HANDLE FindFirstChangeNotification (
LPCTSTR lpPathName, //
BOOL bWatchSubtree, //
DWORD dwNotifyFilter // );
INVALID_HANDLE_VALUE.
dwNotifyFilter , :
FILE_NOTIFY_CHANGE_FILE_NAME ;
FILE_NOTIFY_CHANGE_DIR_NAME ;
FILE_NOTIFY_CHANGE_ATTRIBUTES ;
FILE_NOTIFY_CHANGE_SIZE ;
, .
BOOL FindNextChangeNotification(
HANDLE hChangeHandle //
);
FindCloseChangeNotification, .
BOOL FindCloseChangeNotification(
HANDLE hChangeHandle //
);
1. , .
#include <windows.h>
#include <iostream>
#include <conio.h>
using namespace std;
int main()
{
char buf[256],buf1[256];
int iMenu;
char cMenu[200]=" :\n1 - \n2 - \n3 - \n4 - \n5 - / \n6 - \n7 - \n";
CharToOem(cMenu, cMenu);
while(1)
{
WIN32_FIND_DATA FindFileData;
HANDLE hFind;
LONG cFiles=1;
BOOL bFindMore = TRUE;
system("cls");
cout << cMenu; cin >> iMenu;
switch(iMenu)
{
system("cls");
case 1:
CharToOem(" \n ? ", buf); cout << buf; cin >> buf;
if(!CreateDirectory(buf,NULL))
{
cerr << "Create directory failed!" <<endl
<< "The last error code: " << GetLastError() <<endl;
cout << "Press any key to continue";
getch();
break;
}
else
cout << "directory created";
getch();
break;
case 2:
CharToOem(" \n ? ", buf); cout << buf; cin >> buf;
if ((hFind=FindFirstFile(buf,&FindFileData)) == INVALID_HANDLE_VALUE)
{
cerr << endl << "Find First File failed!" << endl
<< "The last error code: " << GetLastError() <<endl;
cout << "Press any key to continue";
getch();
break;
}
cout << endl << FindFileData.cFileName << endl;
while (bFindMore)
{
if(bFindMore = FindNextFile(hFind, &FindFileData))
{
cout << FindFileData.cFileName << endl;
cFiles++;
}
}
cout << endl << "The search is completed." << endl
<< cFiles << " files were found" << endl;
cout<<"\nPress any key to continue!";
|
|
|
getch();
break;
case 3:
CharToOem(" \n ?", buf); cout << buf;cin>>buf;
if(!RemoveDirectory(buf))
{
cerr << endl << "Remove Directory failed!" << endl
<< "The last error code: " << GetLastError() <<endl;
cout << "Press any key to continue";
getch();
break;
}
cout << "directory removed";
cout<<"\nPress any key to continue!";
getch();
break;
case 4:
CharToOem(" \n ?", buf); cout << buf; cin >> buf;
CharToOem(" ?", buf1); cout << buf1;cin >> buf1;
if(!MoveFile(buf,buf1))
{
cerr << endl << "Move Directory failed!" << endl
<< "The last error code: " << GetLastError() <<endl;
cout << "Press any key to continue";
getch();
break;
}
cout << "directory moved";
cout<<"\nPress any key to continue!";
getch();
break;
case 5:
CharToOem(" :\n", buf); cout << buf;
GetCurrentDirectory(sizeof(buf),buf);
cout << buf <<endl;
CharToOem(" ?(y/n) ", buf); cout << buf; cin >> buf;
if(*buf=='y')
{
CharToOem(" ! ", buf);cout << buf; cin >> buf;
if(!SetCurrentDirectory(buf))
{
cerr << endl << "Set Current failed!" << endl
<< "The last error code: " << GetLastError() <<endl;
}
else cout << "The current directory is set" << endl;
}
cout<<"\nPress any key to continue!";
getch();
break;
case 6:
CharToOem(" \n ?", buf); cout << buf; cin>>buf;
if ((hFind=FindFirstChangeNotification(buf,false, FILE_NOTIFY_CHANGE_FILE_NAME|FILE_NOTIFY_CHANGE_DIR_NAME|FILE_NOTIFY_CHANGE_SIZE)) == INVALID_HANDLE_VALUE)
{
cerr << endl << "Find First Notification failed!" << endl
<< "The last error code: " << GetLastError() <<endl;
cout << "Press any key to continue";
getch();
break;
} else cout << "Watch.." << endl;
while (WaitForSingleObject(hFind,10000)!=WAIT_OBJECT_0) { }
cout << endl << "The watched directory has been changed." << endl;
bFindMore=false;
cout << "Find next change notification?(y/n)"; cin >>buf;
if(*buf='y') bFindMore=true;
while (bFindMore)
{
if(bFindMore = FindNextChangeNotification(hFind))
{
cout << "Watch.." << endl;
while (WaitForSingleObject(hFind, 10000)!= WAIT_OBJECT_0) {}
cout << endl << "The watched directory has been changed again." << endl;
cout << "Find next change notyfication?(y/n)"; cin >>buf;
if(*buf=='y') bFindMore=true; else bFindMore=false;;
}
else
{
cerr << endl << "Find Notification failed!" << endl
<< "The last error code: " << GetLastError() <<endl;
bFindMore=false;
|
|
|
}
}
FindCloseChangeNotification(hFind);
cout<<"\nPress any key to continue!";
getch();
break;
case 7: return 0;
}
}
return 0;
}
1. :
− ;
− ;
− ;
− ;
− ;
− .
2. , .
3. , .
1. ?
2. , ?
3. ?
4. : FindFirstFile .
5. : FindNextFile .
6. : FindClose .
7. GetFileAttributes ?
8. lhffd?
9. FindFirstFile ?
11
:
:
1. Win32 API, DLL.
2. , , .
, . , .
. , . , .
DLL (. Dynamic Link Library ) Microsoft Windows OS / 2. *. dll, *. ocx ( , ActiveX) *. drv ( ). DLL , PE- (Portable Executable) 32 -, 64- Windows, New-Executable (NE) 16- Windows. DLL , .
1.
DLL DllMain DLL . DllMain DLL , . :
BOOL WINAPI DllMain(
HINSTANCE hinstDLL, // DLL
DWORD fdwReason, // DllMain
LPVOID lpvReserved // Windows
);
, . Microsoft Visual C+ + :
1. DLL, , , .
2. .LIB, . .
3. .DLL, . , , , .DLL .
|
|
|
, - . , :
_declspec (dllexport)
DWORD MyFunction (...);
_declspec ,
MyFunction , .
.DLL .LIB. .LIB , .DLL .
_declspec (dllimport)
DWORD MyFunction (...);
, .. .exe , Project -->Setting Link Project_Options MyFunction.lib. , .DLL . .DLL , .
, , ( LoadLibrary) ( FreeLibrary). . ; . . : LoadLibrary, GetProcAddress FreeLibrary.
HINSTANCE LoadLibrary (LPCTSTR lpLibFileName);
( HINSTANCE, HANDLE) NULL . .DLL . LoadLibrary .. , DLL ( LoadLibrary), . DLL , LoadLibrary , , .
LoadLibraryEx , .
, , , . , , :
BOOL FreeLibrary (HINSTANCE hLibModule);
GetProcAddress.
FARPROC GetProcAddress (HMODULE module, LPCSTR lpProcName);
hModule, ( HINSTANCE HMODULE), , LoadLibrary GetModuleHandle, . lpProcName, Unicode, . NULL.
|
|
|
GetModuleFileName, , hModule. , ( . .dll) GetModuleHandle , , . .
1. , , DLL.
#include "stdafx.h"
#include <iostream>
using namespace std;
extern "C++" __declspec(dllexport) void LetterList()
{
cout << "This function was called from LetterList() " << endl;
}
extern "C++" __declspec(dllexport) int PutInt(int param)
{
return param;
}
2. .
// myFirstDll.dll
#include <windows.h>
int WINAPI DllMain(HINSTANCE hInstance,
DWORD fdReason,
PVOID pvReserved)
{
return TRUE;
}
extern "C" __declspec(dllexport) int MyFunction(char *str)
{
MessageBox(NULL, str,"Function from DLL",MB_OK);
return 1;
}
