Лекция8.ppt

(Interface Definition Language)
import "unknwn.idl";
//Interface IInput
[
object,
uuid(3DC9017D-10E4-4D83-8097-E0FC0497B965),
helpstring("IInput Interface"),
pointer_default(unique)
]
interface

IInput : IUnknown
{
HRESULT input();
HRESULT output();
};

//Interface IPhone
[
object,
uuid(048C493E-A924-4345-8650-18BE597B4129),
helpstring("IPhone Interface"),
pointer_default(unique)
]
interface IPhone : IUnknown
{
HRESULT giveACall([in] int nPhone);
HRESULT takeACall([in] int nPhone);
};

uuid(36C1D956-B61A-4B2C-8795-58CA53298ADB),
helpstring("Component class")
]
coclass CInput
{
[default] interface IInput;
};
};

@5 PRIVATE
proxy.def

"Output data","output Info", MB_OK);
return S_OK;
}
STDMETHODIMP CInput::giveACall(int phoneNumber){
char str[32];
sprintf(str,"You are

ringing up to %i",phoneNumber);
MessageBox(NULL, str,"output Info", MB_OK);
return S_OK;
}
STDMETHODIMP CInput::takeACall(int phoneNumber){
char str[32];
sprintf(str,"Dzine, dzine ... : %i",phoneNumber);
MessageBox(NULL, str,"output Info", MB_OK);
return S_OK;
}

Изменения в коде сервера, код компонента (CInput.cpp):

"guid.h"
#include "CInput.h"

IClassFactory* g_pClassFactory;
DWORD g_dwRegister = 0;
HWND g_hWnd;

LRESULT CALLBACK WndProc (HWND,

UINT, WPARAM, LPARAM) ;
BOOL Init();
void UnInit();

int APIENTRY WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
LPSTR lpszCmdLine, int nCmdShow)
{
HWND hwnd ;
MSG msg ;
WNDCLASS wndclass ;

Init();

CS_HREDRAW | CS_VREDRAW ;
wndclass.lpfnWndProc = WndProc ;

wndclass.cbClsExtra = 0 ;
wndclass.cbWndExtra = 0 ;
wndclass.hInstance = hInstance ;
wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ;
wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;
wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ;
wndclass.lpszMenuName = NULL;
wndclass.lpszClassName = "Class CInput" ;
RegisterClass (&wndclass) ;
}
hwnd = CreateWindow ("Class CInput", "Exe COM CInput",
WS_OVERLAPPEDWINDOW,
CW_USEDEFAULT, 0,
CW_USEDEFAULT, 0,
NULL, NULL, hInstance, NULL) ;
g_hWnd = hwnd;

ShowWindow (hwnd, nCmdShow) ;
UpdateWindow (hwnd) ;

while (GetMessage (&msg, NULL, 0, 0)){
TranslateMessage (&msg) ;
DispatchMessage (&msg) ;
}
return msg.wParam ;
}

WPARAM wParam, LPARAM lParam){

static char str[80] = "It is an Exe Server";
HDC hDC;
PAINTSTRUCT ps;
switch (message){
case WM_PAINT:
hDC = BeginPaint (hwnd, &ps);
TextOut (hDC, 0, 0, str, lstrlen (str));
EndPaint (hwnd, &ps);
return 0;
case WM_DESTROY :
PostQuitMessage (0) ;
return 0;
default:
break;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}

MessageBox(NULL, "CoInitialize failed", "CInput", MB_OK);
return FALSE;

}

g_pClassFactory = new CInputClassFactory;

if (g_pClassFactory == NULL)
return FALSE;

g_pClassFactory->AddRef();

hr = CoRegisterClassObject(CLSID_Input, g_pClassFactory, CLSCTX_LOCAL_SERVER,
REGCLS_MULTIPLEUSE, &g_dwRegister);

if (FAILED(hr))
return FALSE;

return TRUE;
}

CoRevokeClassObject(g_dwRegister);

if (g_pClassFactory != NULL)
g_pClassFactory->Release();

CoUninitialize();
}

Компоновка и регистрация COM-сервера

REGEDIT
HKEY_CLASSES_ROOT\CInput.MyInput\CLSID = {36C1D956-B61A-4B2C-8795-58CA53298ADB}
HKEY_CLASSES_ROOT\CLSID\{36C1D956-B61A-4B2C-8795-58CA53298ADB} = CInput MyInput DLL
HKEY_CLASSES_ROOT\CLSID\{36C1D956-B61A-4B2C-8795-58CA53298ADB}\LocalServer32 = C:\workshop\run\comexe\server\input_exe.exe
HKEY_CLASSES_ROOT\CLSID\{36C1D956-B61A-4B2C-8795-58CA53298ADB}\ProgId = CInput.MyInput
HKEY_CLASSES_ROOT\Interface\{3DC9017D-10E4-4D83-8097-E0FC0497B965} = IInput
HKEY_CLASSES_ROOT\Interface\{3DC9017D-10E4-4D83-8097-E0FC0497B965}\NumMethods = 2
HKEY_CLASSES_ROOT\Interface\{048C493E-A924-4345-8650-18BE597B4129} = IPhone
HKEY_CLASSES_ROOT\Interface\{048C493E-A924-4345-8650-18BE597B4129}\NumMethods = 2

input_exe.reg

main(){
…………………………………………………………….
DWORD dwContext = CLSCTX_LOCAL_SERVER; // необязательно
…………………………………
Компиляция и компоновка клиента (test2.cpp):