Solved

newbie ?s: using the mouse and accessing text files oh and one question about strings

Posted on 2004-04-09
6
265 Views
Last Modified: 2010-04-15
how do i dispay a mouse cursor in my programs? and how do i get my program to find out where it is on the screen. how do i read a text file into a string? and how do i find out how many charachters there are in a string.

i know these should be in seperate questions but i do not have enough points

thanks
ico2
0
Comment
Question by:ico2
  • 3
  • 2
6 Comments
 
LVL 45

Expert Comment

by:Kent Olsen
ID: 10792782
Hi ico2,

The simple question first.  :)

  strlen (String);

This will return the number of characters in the string.  Note that the string is actually one character longer than this!

Cursor management varies with the operating system and device interfaces.

What system are you using?


Good Luck,
Kent
0
 
LVL 2

Expert Comment

by:Avik77
ID: 10792791
Assuming u to be working in DOS environment..
For displaying mouse cursor u require to work with interrupts using function int86 provided in dos.h. u can check the help for its format.
First u have to initialise the mouse cursor using
int initmouse()
{
 i.x.ax=0;
 int86(0x33,&i,&o);
 return(o.x.ax);
}
if return value is 1. then show/display mouse pointer by
void showmouseptr()
{
 i.x.ax=1;
 int86(0x33,&i,&o);
}
u can get mouse position by
void getmousepos()
{
 i.x.ax=3;
 int86(0x33,&i,&o);
 button=o.x.bx;
 X=o.x.cx;
 Y=o.x.dx;
}
X and Y are the(x,y) co-ordinates on the screen. Declare X,Y as global variables to always get the mouse cursor position on the screen.

Here i.x.ax (say) means register A (16 bit).
and int86 calls with 0x33 as the interrupt number of the mouse service routine. It is multiplied by 4 to give the location of the ISR of mouse.

Avik.
0
 
LVL 1

Author Comment

by:ico2
ID: 10792934
avik77-that produces tons of errors with my compiler.

undefined symbols and invalid structures etc.
0
Windows Server 2016: All you need to know

Learn about Hyper-V features that increase functionality and usability of Microsoft Windows Server 2016. Also, throughout this eBook, you’ll find some basic PowerShell examples that will help you leverage the scripts in your environments!

 
LVL 2

Expert Comment

by:Avik77
ID: 10793017
>>how do i read a text file into a string?
u can do a character wise copy from ur text file to a string, or u can find the length of the input text file, and copy block to a string buffer using fread.

Avik.
0
 
LVL 2

Accepted Solution

by:
Avik77 earned 20 total points
ID: 10793076
>>avik77-that produces tons of errors with my compiler.
declare
union REGS i,o; // globally
and include dos.h

Avik.
0
 
LVL 1

Author Comment

by:ico2
ID: 10794109
ok i had to edit the code a bit to make it compile. but it works now. thanks very much.

thanks also to kdo but i can only credit one person.
0

Featured Post

Problems using Powershell and Active Directory?

Managing Active Directory does not always have to be complicated.  If you are spending more time trying instead of doing, then it's time to look at something else. For nearly 20 years, AD admins around the world have used one tool for day-to-day AD management: Hyena. Discover why

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

This tutorial is posted by Aaron Wojnowski, administrator at SDKExpert.net.  To view more iPhone tutorials, visit www.sdkexpert.net. This is a very simple tutorial on finding the user's current location easily. In this tutorial, you will learn ho…
This is a short and sweet, but (hopefully) to the point article. There seems to be some fundamental misunderstanding about the function prototype for the "main" function in C and C++, more specifically what type this function should return. I see so…
The goal of this video is to provide viewers with basic examples to understand how to use strings and some functions related to them in the C programming language.
Video by: Grant
The goal of this video is to provide viewers with basic examples to understand and use while-loops in the C programming language.

830 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question