home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Desktop Works 1995 - 1996
/
desktopworks1995-1996.iso
/
scrnsave
/
worm
/
biblio.c
< prev
next >
Wrap
C/C++ Source or Header
|
1996-01-01
|
2KB
|
74 lines
#include "worm.h"
/* ------------------------------------------------------------------ */
int ErrorBox(char *message)
{
return (MessageBox ( GetFocus(), message,
"Worming Error", MB_ICONASTERISK | MB_OK));
}
/* ------------------------------------------------------------------ */
void CreateDialogBox(HWND hWnd, FARPROC DlgProc, int idd)
{
extern HANDLE hInst;
FARPROC lpProc;
lpProc = MakeProcInstance(DlgProc, hInst);
DialogBox(hInst, MAKEINTRESOURCE(idd), hWnd, lpProc);
FreeProcInstance(lpProc);
}
/* ------------------------------------------------------------------ */
/* The following pseudo-random sequence generator was published in
Dr. Dobb's Journal, February 1992. I beleive it to be superior to the
rand function.
*/
unsigned LSFR(void)
{
static unsigned long reg = 10;
reg = ((((reg >> 31) /* shift the 32nd bit to the first bit */
^ (reg >> 6) /* XOR it with the seventh bit */
^ (reg >> 4) /* XOR it with the fifth bit */
^ (reg >> 2) /* XOR it with the third bit */
^ (reg >> 1) /* XOR it with the second bit */
^ reg) /* XOR it with the fist bit */
& 0x00000001) /* strip all the other bits off and */
<< 31) /* move it back to the 32nd bit. */
| (reg >> 1); /* or it with the register shifted right. */
return (int) reg & 0x00000001; /* return the first bit */
}
/* ------------------------------------------------------------ */
BOOL IsOnDesktop(POINT testPoint)
{
HWND desktopHandle = GetDesktopWindow();
POINT point;
int size = GetSize();
point.x = testPoint.x + size;
point.y = testPoint.y + size;
if(WindowFromPoint(point) != desktopHandle)
return FALSE;
point.x = testPoint.x - size;
if(WindowFromPoint(point) != desktopHandle)
return FALSE;
point.y = testPoint.y - size;
if(WindowFromPoint(point) != desktopHandle)
return FALSE;
point.x = testPoint.x + size;
if(WindowFromPoint(point) != desktopHandle)
return FALSE;
return TRUE;
}
/* ------------------------------------------------------------------ */
/* EOF */