poke() and pokeb() in c ~ Online tutorial

poke() and pokeb() in c

poke(),pokeb()
poke stores an integer value at the memory location segment:offset
pokeb stores a byte value at the memory location segment:offset
Declaration:
void poke(unsigned segment, unsigned offset, int value);
void pokeb(unsigned segment, unsigned offset, char value);
Remarks:
poke stores the integer value at the memory location segment:offset.
pokeb stores the byte value at the memory location segment:offset.

If you call either of these routines when DOS.H has been included, the routine will be treated as a macro that expands to inline code.
If you don't include DOS.H, or if you do include it and #undef poke (or pokeb), you'll get the function rather than the macro.
Return Value:
None
Example:

#include<stdio.h>
#include <dos.h>
int main(void)
{
clrscr();
cprintf("Make sure the scroll lock key is off and press any key\r\n");
getch();
poke(0x0000,0x0417,16);
cprintf("The scroll lock is now on\r\n");
return 0;
}

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