autocli.cpp

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/*
 * AUTOCLI.CPP
 * Automation Client Chapter 15
 *
 * Copyright (c)1993-1995 Microsoft Corporation, All Rights Reserved
 *
 * Kraig Brockschmidt, Microsoft
 * Internet  :  [e-mail]
 * Compuserve:  >INTERNET:[e-mail]
 */


#define INITGUIDS
#include "autocli.h"


/*
 * WinMain
 *
 * Purpose:
 *  Main entry point of application.
 */

int PASCAL WinMain(HINSTANCE hInst, HINSTANCE hInstPrev
    , LPSTR pszCmdLine, int nCmdShow)
    {
    MSG         msg;
    PCApp       pApp;

    SETMESSAGEQUEUE;

    pApp=new CApp(hInst, hInstPrev, nCmdShow);

    if (NULL==pApp)
        return -1;

    if (pApp->Init())
        {
        while (GetMessage(&msg, NULL, 0,0 ))
            {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
            }
        }

    delete pApp;
    return msg.wParam;
    }





/*
 * AutoClientWndProc
 *
 * Purpose:
 *  Window class procedure.  Standard callback.
 */

LRESULT APIENTRY AutoClientWndProc(HWND hWnd, UINT iMsg
    , WPARAM wParam, LPARAM lParam)
    {
    PCApp           pApp;
    WORD            wID;
    DISPID          dispID, dispIDParam;
    DISPPARAMS      dp;
    VARIANTARG      va;
    EXCEPINFO       exInfo;
    UINT            uErr;
    HRESULT         hr;
    TCHAR           szMsg[80];

    pApp=(PCApp)GetWindowLong(hWnd, AUTOCLIWL_STRUCTURE);

    switch (iMsg)
        {
        case WM_NCCREATE:
            pApp=(PCApp)(((LPCREATESTRUCT)lParam)->lpCreateParams);
            SetWindowLong(hWnd, AUTOCLIWL_STRUCTURE, (LONG)pApp);
            return (DefWindowProc(hWnd, iMsg, wParam, lParam));

        case WM_DESTROY:
            PostQuitMessage(0);
            break;

        case WM_COMMAND:
            wID=LOWORD(wParam);

            switch (wID)
                {
                case IDM_GETSOUND:
                    //Find the dispID we need
                    hr=pApp->NameToID(OLETEXT("Sound"), &dispID);

                    if (FAILED(hr))
                        break;

                    //Get the property
                    SETNOPARAMS(dp);
                    VariantInit(&va);
                    hr=pApp->Invoke(dispID, DISPATCH_PROPERTYGET
                        , &dp, &va, &exInfo, NULL);

                    if (SUCCEEDED(hr))
                        {
                        wsprintf(szMsg, TEXT("Current 'Sound' is 0x%lX")
                            , va.lVal);
                        }
                    else
                        {
                        wsprintf(szMsg
                            , TEXT("Get 'Sound' failed with 0x%lX")
                            , hr);
                        }

                    pApp->Message(szMsg);
                    break;

                case IDM_SETSOUNDDEFAULT:
                case IDM_SETSOUNDHAND:
                case IDM_SETSOUNDQUESTION:
                case IDM_SETSOUNDEXCLAMATION:
                case IDM_SETSOUNDASTERISK:
                case IDM_SETSOUNDBOGUS:
                    //Find the dispID we need
                    hr=pApp->NameToID(OLETEXT("Sound"), &dispID);

                    if (FAILED(hr))
                        break;

                    /*
                     * Call IDispatch::Invoke passing wID which
                     * is a sound identifier (IDM_SETSOUNDDEFAULT
                     * has to set the sound to zero).  The "bogus"
                     * sound should cause an exception.
                     */

                    //Initialize arguments
                    VariantInit(&va);
                    va.vt=VT_I4;
                    va.lVal=(IDM_SETSOUNDDEFAULT==wID)
                        ? 0L : (long)(wID);

                    /*
                     * Passing a named DISPID_PROPERTYPUT
                     * is required when setting properties.
                     */
                    dispIDParam=DISPID_PROPERTYPUT;
                    SETDISPPARAMS(dp, 1, &va, 1, &dispIDParam);

                    hr=pApp->Invoke(dispID, DISPATCH_PROPERTYPUT
                        , &dp, NULL, &exInfo, NULL);

                    if (SUCCEEDED(hr))
                        {
                        /*
                         * Note that if the automation object can't
                         * raise an exception, setting the bogus
                         * value will return success although there
                         * is no change in the actual property.
                         */
                        lstrcpy(szMsg, TEXT("Set 'Sound' succeeded"));
                        }
                    else
                        {
                        wsprintf(szMsg
                            , TEXT("Set 'Sound' failed with 0x%lX"), hr);
                        }

                    pApp->Message(szMsg);
                    break;

                case IDM_BEEP:
                    if (NULL==pApp->m_pIDispatch)
                        break;

                    hr=pApp->NameToID(OLETEXT("Beep"), &dispID);

                    if (FAILED(hr))
                        break;

                    SETNOPARAMS(dp);
                    VariantInit(&va);
                    hr=pApp->Invoke(dispID, DISPATCH_METHOD, &dp
                        , &va, &exInfo, &uErr);

                    /*
                     * va will have the sound played as the return
                     * value of the Beep method.
                     */
                    if (SUCCEEDED(hr))
                        {
                        wsprintf(szMsg, TEXT("'Beep' played 0x%lX")
                            , va.lVal);
                        }
                    else
                        {
                        wsprintf(szMsg
                            , TEXT("'Beep' failed with 0x%lX"), hr);
                        }

                    pApp->Message(szMsg);
                    break;

                case IDM_EXIT:
                    PostMessage(hWnd, WM_CLOSE, 0, 0L);
                    break;
                }
            break;

        default:
            return (DefWindowProc(hWnd, iMsg, wParam, lParam));
        }

    return 0L;
    }




/*
 * CApp::CApp
 * CApp::~CApp
 *
 * Constructor Parameters: (from WinMain)
 *  hInst           HINSTANCE of the application.
 *  hInstPrev       HINSTANCE of a previous instance.
 *  nCmdShow        UINT specifying how to show the app window.
 *
 */

CApp::CApp(HINSTANCE hInst, HINSTANCE hInstPrev
    , UINT nCmdShow)
    {
    m_hInst=hInst;
    m_hInstPrev=hInstPrev;
    m_nCmdShow=nCmdShow;

    m_hWnd=NULL;
    m_fInitialized=FALSE;

    /*
     * Get the current LCID to send to the automation object.
     * Note that depending on the Beeper installed, this may or
     * may not work, especially if you are in a non-english or
     * non-German speaking locale.
     */
    m_lcid=GetUserDefaultLCID();

    m_szHelpDir[0]=(TCHAR)0;
    m_pIDispatch=NULL;
    return;
    }


CApp::~CApp(void)
    {
    if (NULL!=m_pIDispatch)
        {
        m_pIDispatch->Release();
        m_pIDispatch=NULL;
        }

    if (IsWindow(m_hWnd))
        DestroyWindow(m_hWnd);

    if (m_fInitialized)
        CoUninitialize();

    return;
    }




/*
 * CApp::Init
 *
 * Purpose:
 *  Initializes an CApp object by registering window classes,
 *  creating the main window, and doing anything else prone to
 *  failure such as calling CoInitialize.  If this function fails
 *  the caller should insure that the destructor is called.
 *
 * Parameters:
 *  None
 *
 * Return Value:
 *  BOOL            TRUE if successful, FALSE otherwise.
 */

BOOL CApp::Init(void)
    {
    WNDCLASS    wc;
    HRESULT     hr;

    CHECKVER_OLE;

    if (FAILED(CoInitialize(NULL)))
        return FALSE;

    m_fInitialized=TRUE;

    if (!m_hInstPrev)
        {
        wc.style          = CS_HREDRAW | CS_VREDRAW;
        wc.lpfnWndProc    = AutoClientWndProc;
        wc.cbClsExtra     = 0;
        wc.cbWndExtra     = CBWNDEXTRA;
        wc.hInstance      = m_hInst;
        wc.hIcon          = LoadIcon(m_hInst, TEXT("Icon"));
        wc.hCursor        = LoadCursor(NULL, IDC_ARROW);
        wc.hbrBackground  = (HBRUSH)(COLOR_WINDOW + 1);
        wc.lpszMenuName   = MAKEINTRESOURCE(IDR_MENU);
        wc.lpszClassName  = TEXT("AUTOCLI");

        if (!RegisterClass(&wc))
            return FALSE;
        }

    m_hWnd=CreateWindow(TEXT("AUTOCLI")
        , TEXT("Automation Object Client"), WS_OVERLAPPEDWINDOW
        , 35, 35, 450, 250, NULL, NULL, m_hInst, this);

    if (NULL==m_hWnd)
        return FALSE;

    //Create the beeper object we want to manipulate.
    hr=CoCreateInstance(CLSID_Beeper, NULL, CLSCTX_INPROC_SERVER
        , IID_IDispatch, (PPVOID)&m_pIDispatch);

    if (FAILED(hr))
        {
        Message(TEXT("Failed to create object--terminating"), MB_OK);
        return FALSE;
        }

    //Try to get the help directory for the object's type information
    HelpDirFromCLSID(CLSID_Beeper, m_szHelpDir);

    ShowWindow(m_hWnd, m_nCmdShow);
    UpdateWindow(m_hWnd);

    return TRUE;
    }