It occurred to me that it might be useful to be able to capture the mouse from the command-line, so that a batch or conf file could capture the mouse, start a game, and release the mouse afterward. I couldn't find any way to do this in the existing code, so I somehow managed to throw together a MOUSECAP command. I don't know anything about programming, so this is probably incompetent, and a real programmer could do it better, but it seems to work. Here's how to do it:

1. In shell.h, add to the list of commands:

1void CMD_MOUSECAP(char * args);

2. In shell_cmds.cpp, add below the list of includes:

1extern void GFX_CaptureMouse(void);
2extern bool mouselocked;

3. Also in shell.cmds.cpp, in the cmd_list near the top, add:

1{	"MOUSECAP",	0,			&DOS_Shell::CMD_MOUSECAP,	"SHELL_CMD_MOUSECAP_HELP"},

4. Also in shell.cmds.cpp, among the code for the actual commands, add:

1void DOS_Shell::CMD_MOUSECAP(char * args) {
2	HELP("MOUSECAP");
3	GFX_CaptureMouse();
4		if (mouselocked)
5			WriteOut("Mouse captured.\n");
6		else 
7			WriteOut("Mouse released.\n");
8}

5. Finally, in shell.cpp, add among the help texts:

1	MSG_Add("SHELL_CMD_MOUSECAP_HELP","Toggle mouse capture.\n");

I hope someone else finds this useful.