INFO: mouse_event Different Between Windows 2000 Beta & Win 98 (193005)

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On Windows 98, mouse_event only allows absolute moves on the primary monitor. On Windows 2000 Beta 2, mouse_event allows absolute moves onto all monitors that are part of the virtual desktop. Relative moves are allowed on all monitors that are attached to the desktop on both platforms.

This difference in behavior is by design.

When you try to move the mouse cursor to an area that does not exist on any monitor you might have unpredictable results. For example, the cursor might not move at all, it might actually move and become invisible, or it might simply stop at the edge of the screen. It is up to you, as the developer, to make sure that relative moves end up on defined parts of the virtual desktop.

Because this article refers to a Beta product (Windows 2000, Beta 2), references to the behavior of the Beta product are informational only, and (as in all Beta products) there is no guarantee that the specific feature which is currently described will be identical in the released version.