The "User Interface Style Guide" (UISG) suggests that the user
should be informed when a window can temporary not accept any
input. The most simple possibility is to use a "busy" mouse-pointer.
A "busy"-pointer has a special look defined in the UISG.
This module gives you one set of procedures to set and remove
only the busy-pointer and another to both change the mouse-pointer
and block all user input by opening an invisible Intuition
Requester.

 PERMSSN    UID  GID    PACKED    SIZE  RATIO     CRC       STAMP          NAME
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[generic]                  904    1592  56.8% -lh5- e2e9 Feb 16  1995 LockWindow/.product-info
[generic]                 1890    6097  31.0% -lh5- c3ff Feb 16  1995 LockWindow/LockWindow.guide
[generic]                  225     468  48.1% -lh5- 66b6 Feb 16  1995 LockWindow/LockWindow.guide.info
[generic]                 2241    7540  29.7% -lh5- c41e Feb 16  1995 LockWindow/LockWindow.mod
[generic]                  380     849  44.8% -lh5- 9c40 Feb 16  1995 LockWindow/LockWindow.mod.info
[generic]                  424     920  46.1% -lh5- 0911 Feb 16  1995 LockWindow.info
---------- ----------- ------- ------- ------ ---------- ------------ -------------
 Total         6 files    6064   17466  34.7%            Feb 17  1995