INF: Getting to the Mouse from a Real-Mode C Program

ID Number: Q12012

3.00 4.00 5.00 6.00 6.00a 6.00ax 7.00

MS-DOS

Summary:

Below is a program example to test mouse usage from a C program. The

mouse driver must be installed first. This type of information is

described in the "Mouse Programming Interface" chapter of the

"Microsoft Mouse Programmer's Reference" available from Microsoft

Press.

More Information:

Sample Code

-----------

#include <stdio.h>

#include <dos.h>

int m1=0,m2=0,m3=0,m4=0;

union REGS Mouse_regs;

void mouse(void)

{

Mouse_regs.x.ax=m1;

Mouse_regs.x.bx=m2;

Mouse_regs.x.cx=m3;

Mouse_regs.x.dx=m4;

int86(0x33,&Mouse_regs,&Mouse_regs);

m1=Mouse_regs.x.ax;

m2=Mouse_regs.x.bx;

m3=Mouse_regs.x.cx;

m4=Mouse_regs.x.dx;

}

void main(void)

{

/* Turn on the mouse */

m1 = 1; /* SHOW MOUSE Opcode -- See reference */

m2 = m3 = m4 = 0; /* Additional parameters (init=0) */

mouse(); /* Make it happen */

for (;;) /* Loop until both buttons are down */

{

m1=3; /* Get mouse status */

m2=m3=m4=0;

mouse();

if (m2 & 1)

printf("Left button down\n");

if (m2 & 2)

printf("Right button down\n");

if (m2 & 1 && m2 & 2)

{

printf("BOTH!\n");

exit(0);

}

}

}

Additional reference words: 5.00 5.10 6.00 6.00a 6.00ax 7.00