Date: Wed, 8 Sep 93 10:35:56 +0200
From: vincent AT physique DOT ens DOT fr (CROQUETTE Vincent)
To: djgpp AT sun DOT soe DOT clarkson DOT edu

 Joe Clark      writes :
>subject: system() call, new releases


>I just started playing with the system() call the other day and
>I noticed that the system hangs (in graphics mode at least) if I
>call getkey() at any point in the program after the system() call.

>I'm using djgpp1.09 and libgrx1.02.

>If this is a bug and not my own mistake is this fixed in 
>later releases (I saw something in NEW110.DOC about fixing
>the system paging bug).

you may be doing the same mistake than i was : keybord and mouse event
are trapped in GRX (if you use MouseEventMode(1)), before the system call
you MUST do a MouseUnInit, (this could be added in GRX doc)
here is an example :


	GrSetMode(GR_default_text);			
	MouseUnInit();	/* if you forget this you loose keyboard ! */
	
	system(cmd);

	GrSetMode(GR_default_graphics);	
	MouseEventEnable(M_KEYPRESS,M_BUTTON_DOWN);
	MouseEventMode(1);
	MouseInit();
	MouseSetColors(GrAllocColor(255,0,0),GrBlack());
	MouseDisplayCursor();


vincent Croquette

vincent AT physique DOT ens DOT fr