ACTIVE-X CONTROL

Guided by,

Ms. K. JAYAPRIYA, B. Tech., LECTURER OF MCA,

Presented by,

A.ARCHUNAN, [MCA963]S.KARTHICK, [MCA969]P.MUTHU KUMAR, [MCA978]A.SENTHIL KUMAR, [MCA999]S.SURESH, [MCA9104]

PRESENTATION OUTLINE

Introduction Active-x control Vs Ordinary Wnd control Installing Active-x Controls The Calendar Controls Active-x Control Container Programming Create Active-x Control at Runtime

INTRODUCTION

OLE Controls

Used by Application Developers

Written in C++ (ATL Library)

ACTIVE-X CONTROL VS ORDINARY WINDOWS CONTROL

Ordinary Control

Child Window Standard Window Messages CWnd Class Separate DLL

ACTIVE-X CONTROL VS ORDINARY WINDOWS CONTROL

Similarities

Child Window

WM_CREATE handler

Container

WAYS TO WRITE AN ACTIVEX CONTROL

Microsoft Foundation Class (MFC)

Active-X Template Library (ATL)

Base Ctrl Framework

Visual J++ (COM Object only)

PROPERTIES & METHODS

Properties have symbolic names Index value Dialog Data exchange Methods are like functions It does not send WM_Notification Event does not return value Example

Key Down, New Month.

INSTALLING ACTIVEX CONTROL

Choose add to project from the project menu and choose components and controls

Select registered ActiveX controls

INSTALLING ACTIVEX CONTROL

To copy the ActiveX controls DLL \windows\system for Microsoft win95

Register controls in windows registry

THE CALENDAR CONTROLS

THE CALENDAR CONTROLS

Properties Back Color Day,etc..

Methods NextDay Next Week,etc..

Events Keydown Keyup,etc..

ACTIVEX CONTROL CONTAINER PROGRAMMING

Child window

DDX and its Property value

PROPERTY ACCESS

The ActiveX control developer design

Control and choose Properties.

Design-time properties

CLASS WIZARD'S C++ WRAPPER CLASSES FOR ACTIVEX CONTROLS

C++ wrapper class Dynamically create an instance Match with Dispatch ID Set and Get functions

CLASS WIZARD'S C++ WRAPPER CLASSES FOR ACTIVEX CONTROLS

unsigned long CCalendar::GetBackColor(){ unsigned long result; InvokeHelper(DISPID_BACKCOLOR, DISPATCH_PROPERTYGET,

VT_I4, (void*)&result, NULL); return result;}void CCalendar::SetBackColor(unsigned long newValue){ static BYTE parms[] = VTS_I4; InvokeHelper(DISPID_BACKCOLOR, DISPATCH_PROPERTYPUT,

VT_EMPTY, NULL, parms, newValue);}

CLASS WIZARD'S C++ WRAPPER CLASSES FOR ACTIVEX CONTROLS

void CCalendar::NextDay()

{

InvokeHelper(0x16, DISPATCH_METHOD, VT_EMPTY, NULL, NULL);

}

void CCalendar::NextMonth()

{

InvokeHelper(0x17, DISPATCH_METHOD, VT_EMPTY, NULL, NULL);

}

APPWIZARD SUPPORT FOR ACTIVEX CONTROLS

AppWizard inserts the class Initinstance

Class InitInstance member function: AfxEnableControlContainer();

It also inserts the following line in the project's StdAfx.h file:

#include <afxdisp.h>

CLASSWIZARD AND THE CONTAINER DIALOG

Data members functions

Event handler functions

MAPPING ACTIVEX CONTROL EVENTS

Windows messages and command messages

Dialog class contains one or more ActiveX

controls

It works something like a message map.

CREATING ACTIVEX CONTROLS AT RUNTIME

ClassWizard will create the files

Constructed and destroyed

Manually add the necessary event message

handlers

QUERIES?