Conditional Messages:VC++

Started by sukishan, Jul 12, 2009, 11:27 PM

previous topic - next topic
Go Down

sukishan

Conditional Messages

Introduction

The messages we have used so far belong to specific events generated at a particular time by a window. Sometimes in the middle of doing something, you may want to send a message regardless of what is going on. This is made possible by a function called SendMessage(). Actually, there are two SendMessage() versions available.

The Win32 API version of the SendMessage() function has the following syntax:

LRESULT SendMessage(HWND hWnd, UINT Msg, WPARAM wParam, LPARAM lParam);The MFC version is defined as follows:

LRESULT SendMessage(UINT Msg, WPARAM wParam, LPARAM lParam);Because the Win32 version is considered global, if you want to use it, you must precede it with the scope access operator "::" as in:

::SendMessage(WhatToDo);The hWnd argument is the object or control that is sending the message.

The Msg argument is the message to be sent.

The wParam and the lParam values depend on the message that is being sent.

The advantage of using the SendMessage() function is that, when sending this message, it would target the procedure that can perform the task and this function would return only after its message has been processed.
A good beginning makes a good ending

Go Up
 

Quick Reply

With Quick-Reply you can write a post when viewing a topic without loading a new page. You can still use bulletin board code and smileys as you would in a normal post.

Warning: this topic has not been posted in for at least 120 days.
Unless you're sure you want to reply, please consider starting a new topic.

Note: this post will not display until it's been approved by a moderator.
Name:
Email:
Verification:
Please leave this box empty:

Type the letters shown in the picture
Listen to the letters / Request another image

Type the letters shown in the picture:

shortcuts: alt+s submit/post or alt+p preview
IT Acumens Web Designing Chennai | GinGly :: Build your Personal Website | CineBuzz :: Cinema News | My Kids Diary :: Kids Memories Writing :: Book Website @ 349 Rs monthly
Copyright 2005 - 2020 :: IT Acumens :: All Rights Reserved. :: Sitemap
ITAcumens Discussion Forum with 2 lakhs post running for 15 years - Powered by IT Acumens Dedicated Server