Messages - visual basic programming, Visual Basic Programming

MESSAGES

The Windows-based applications do not make explicit function calls to acquire input. They wait for the system to pass the input to them. The system passes input to the different windows in the application. Each window has a function, the window process, which is called by the system when it has input for the window. The window process processes the input and returns control to the system. The system passes the input to a window procedure in the form of messages.

The Messages are generated by both the system and applications. The system produces a message for each and every input event - for illustration, when the user types, moves the mouse or clicks a control like a list box. The system also produces messages in response to changes in the system brought about by an application, like when an application resizes one of its windows. An application can produce messages to direct its own windows to perform the tasks or to communicate with windows in other applications.

Whenever a window procedure receives a message, it uses a message identifier to conclude how to process the message. The message identifiers WM_PAINT tell the window procedure that the window's client region has changed and should be repainted. The WM is for common window messages.

Posted Date: 10/9/2012 7:50:37 AM | Location : United States







Related Discussions:- Messages - visual basic programming, Assignment Help, Ask Question on Messages - visual basic programming, Get Answer, Expert's Help, Messages - visual basic programming Discussions

Write discussion on Messages - visual basic programming
Your posts are moderated
Related Questions
Explain difference, Generic Variable: Create Object Ex:-Ole-Automation . No need refer the object library. What is Specific Variable: Binding Procedure Early & Late Binding ( Can

A program needs to be written that is capable of simple image processing. All the images that are available for you to use, can be found on Blackboard in the Assignments section. T

For this assignment you have to design and implement a VB.NET project which prepares a bill of payment due, given the purchase amount. The project models a typical purchase transac

MODULE The Modules are the collection of VB statements. Modules are used to simplify the program development. To add a module to your project, choose the project tabpage, and t

sir , i need visual basic form design & coding for Reynolds number & type of flow .

The scope of a variable is finding out by where you declare it. While you declare a variable in a procedure, only code in that procedure can access or alter the value of that varia

Would it be possible to see an example of an array program that tracks rent in different apartment buildings and is modular?

Graphics Device Interface - GDI:   The GDI is a windows API. The GDI uses a set of generic graphics objects to draw to the screen, to the memory and printers. Therefore the p

WINDOWS 32 BIT (WIN 32) APPLICATIONS   The Win 32 based applications are the applications developed for the windows family of the operating systems. The Win 32 applications ac

Describe different validation controls of VB.net?