home *** CD-ROM | disk | FTP | other *** search
- SS
- A Screen Saver Utility
- For Windows 3.0
-
- Version 1.4 January 24,1991
- Copyright 1991 Tom Wheeler
- [72037,1742]
-
-
- The programs and documentation contained herein are hereby placed in the
- public domain. You may use any portion of this material as you see fit
- for your own personal use provided no part of anything contained herein
- is used or distributed commercially.
-
- This material may not be distributed unless all modules listed below
- are included in the final distributed version:
-
- LIBENTRY ASM 2481 11-02-90 9:21p
- README TXT 5615 01-24-91 8:33p
- SAVE BMP 8310 11-01-90 9:59p
- SS C 23307 01-24-91 2:23p
- SS DEF 433 01-24-91 10:30a
- SS DLG 1556 01-24-91 8:01p
- SS EXE 21248 01-24-91 8:01p
- SS H 1231 11-02-90 7:34p
- SS ICO 766 10-13-90 11:33a
- SS MAK 2250 01-24-91 7:51p
- SS RC 926 11-02-90 6:17p
- SSHOOK C 4828 11-02-90 9:16p
- SSHOOK DEF 331 11-02-90 9:21p
- SSHOOK DLL 2112 01-24-91 7:50p
- SSHOOK MAK 2173 01-24-91 7:49p
- SSHOOK RC 973 10-11-90 8:42p
-
- No claim of suitability of use is made for these programs. The user is
- solely responsible to determine whether or not these programs perform
- properly on any given computer system.
-
- The use of this program is quite simple. Execute the program "SS.EXE" by
- any means desired from within Windows 3.0. Make sure that the dynamic link
- library "SSHOOK.DLL" is available in the directory the program is being
- executed from or that it is placed in a directory that can be located with
- the "PATH" environment variable.
-
- The program initializes as an Icon and cannot be maximized. Click on the
- Icon to select its system menu and choose the "Time" menu option to set the
- Activation Time of the Screen Saver. The Activation Time is initialized to
- 10 minutes the first time the program is run. Enter the desired Activation
- Time and click "Save" to permanently save this value or "Cancel" to abort.
- This value will be recorded in your "Win.Ini" Windows initialization file
- and will be used every time that "SS" is run until changed again.
-
- "SS" detects keystrokes and mouse movements. If "SS" detects that no keys
- have been pressed or that the mouse has not moved within the period of time
- defined by the Activation Time, the screen will blank and a graphic icon
- will be randomly moved around the screen until either a key is pressed, the
- mouse is moved, or a mouse button is clicked. "SS" cannot detect keystrokes
- entered in a DOS application running under Windows so it is possible that
- the screen will be blanked if you are running a DOS application in a Window.
- Full screen DOS applications do not experience this problem.
-
- This program was written as an experiment to try out various Windows
- functions, primarily the use of the SetWindowsHook function, bitmap
- manipulation, and the creation of a DLL (dynamic link library). The make
- scripts were generated using the PWB (Programmers Work Bench) included with
- Microsoft C 6.0. The program was compiled and linked with Microsoft C 6.0
- and Link 5.1.
-
- ========================= VERSION 1.4 =========================
-
- As stated above, SS was primarially written as a programming exercise. Due
- to the suprising number of downloads, however, I have decided to create this
- release to fix some problems noted by many of you.
-
- Previous versions had problems capturing mouse input cleanly. It seems that
- this is quite a trickey problem under Windows. This version attempts to
- correct subtle problems encountered previously.
-
- Formerly, SS set an internal timer to determine when to sample mouse input.
- Upon expiration of the timer, it would start capturing mouse input for all
- of Windows to determine if the system was idle or not. Mouse capture would
- not be released until either some mouse or keyboard activity was detected, or
- when the screen was actually blanked. Although this was reliable for most
- purposes, it could cause windows, menus, scroll bars, buttons, etc. to
- momentarially loose some messages. This would result in strange behavior
- such as a menu or scrollbar "freezing", a double click to be missed, etc.
-
- This version takes a totally different (and I hope safe) approach to looking
- at mouse activity. The mouse timer now expires once a second. When this
- happens SS looks to see which window is currently active. The active window
- is then "sub-classed" (for non-programmers, this is a technique of capturing
- a windows messages). At this point, all messages can be filtered and mouse
- movement and mouse buttons can be sampled while the mouse is active within
- that window (which is usually most of the time).
-
- The only problem I am aware of with this release is its inability to detect
- keystrokes in a DOS application when running in 386 Enhanced Mode (if you
- are running in Real or Standard Modes it is meaningless to try to detect DOS
- keystrokes anyhow). If anyone out there knows of a technique to do this, I
- would greatly appreciate hearing from you.
-
-
-