Category : OS/2 Files
Archive   : PM-M2A.ZIP
Filename : ERASEBKG.MOD

 
Output of file : ERASEBKG.MOD contained in archive : PM-M2A.ZIP
(*----------------------------------------------------------------------------*)
(* Example OS/2 Presentation Manager Program adapted from the book *)
(* "OS/2 Presentation Manager - Programming Primer" by Asael Dror & *)
(* Robert Lafore *)
(* *)
(* Example programs converted to JPI Modula-2 Version 2 for OS/2 1.2 by *)
(* Chris Barker, August 1990 *)
(* *)
(* Notes: I am distributing these programs so that others can learn and also *)
(* so I can elicit feedback from the user community on programming for*)
(* OS/2 PM using Modula-2. If your have any questions, suggestions, *)
(* or comments I'd love to hear from you. I may be reached at the *)
(* following addresses: *)
(* *)
(* Compuserve ID: 72261,2312 *)
(* Pete Norloff's OS/2 Shareware BBS - (703) 385-4325 *)
(* Max's Doghouse BBS - (703) 548-7849 *)
(* The above two BBS carry the Fidonet OS/2 echo which I read *)
(* regularly. *)
(* Programmer's Corner - (301) 596-1180 *)
(* CPCUG Mix (Window Sig) BBS - (301) 738-9060 *)
(* *)
(* I hope I hear from you! *)
(* *)
(* - Chris *)
(* *)
(*----------------------------------------------------------------------------*)

(*----------------------------------------------------------------------------*)
(* Program Notes: *)
(* Creates a client window identical to DEFWIN but adds a "method" to *)
(* repaint itself whenever the window's position is changed. *)
(* Source code on page 80. *)
(* *)
(*----------------------------------------------------------------------------*)
MODULE ERASEBKG;

(*# call(same_ds => off) *)

IMPORT OS2DEF,Win,Gpi,Dos,Lib,SYSTEM,IO;
FROM OS2DEF IMPORT HDC,HRGN,HAB,HPS,HBITMAP,HWND,HMODULE,HSEM,
POINTL,RECTL,PID,TID,LSET,NULL,
COLOR,NullVar,NullStr,BOOL ;

TYPE
StrPtr = POINTER TO ARRAY[0..0] OF CHAR;

CONST
szClientClass = 'Client Window';

VAR
hab : HAB;
hmq : Win.HMQ;
qmsg : Win.QMSG;
hwndClient,
client,
hwnd : HWND;
r : Win.MRESULT;
flcreateFlags : LSET;

PROCEDURE Error;
BEGIN
END Error;

(*-------------------- Start of window procedure ---------------------*)
(*# save,call(near_call=>off,reg_param=>(),reg_saved=>(di,si,ds,es,st1,st2)) *)

PROCEDURE ClientWinProc(
hwnd : HWND;
msg:CARDINAL;
mp1,mp2:Win.MPARAM)
: Win.MRESULT;


VAR
mm : Win.MOUSEMSG;

BEGIN
CASE msg OF
| Win.WM_ERASEBACKGROUND : RETURN Win.MPARAM(TRUE)
ELSE
RETURN Win.DefWindowProc(hwnd, msg, mp1, mp2)
END;
RETURN Win.MPARAM(FALSE);
END ClientWinProc;



(*# restore *)
(*--------------------- End of window procedure ----------------------*)

BEGIN
flcreateFlags := Win.FCF_TITLEBAR + Win.FCF_SYSMENU + Win.FCF_SIZEBORDER +
Win.FCF_MINMAX + Win.FCF_SHELLPOSITION + Win.FCF_TASKLIST;

hab := Win.Initialize(NULL);
hmq := Win.CreateMsgQueue(hab,0);


IF NOT Win.RegisterClass( (* Register window class *)
hab, (* Anchor block handle *)
szClientClass, (* Window class name *)
ClientWinProc, (* Address of window procedure *)
0, (* No special Class Style *)
0 (* No extra window words *)
) THEN Error END;

hwnd := Win.CreateStdWindow(
Win.HWND_DESKTOP,
Win.WS_VISIBLE,
flcreateFlags,
szClientClass,
' - Client Window',
0,
NULL,
0,
hwndClient);


WHILE( Win.GetMsg( hab, qmsg, HWND(NULL), 0, 0 ) ) DO
r := Win.DispatchMsg( hab, qmsg );
END;

IF NOT Win.DestroyWindow(hwndClient) THEN (* and *)
Error;
END;

IF NOT Win.DestroyWindow(hwnd) THEN (* and *)
Error;
END;

IF NOT Win.DestroyMsgQueue(hmq) THEN (* and *)
Error;
END;

IF NOT Win.Terminate(hab) THEN (* terminate the application *)
Error;
END;

HALT;

END ERASEBKG.


  3 Responses to “Category : OS/2 Files
Archive   : PM-M2A.ZIP
Filename : ERASEBKG.MOD

  1. Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/