Intermec Janus 2020 Reference Manual - Im_Get_Viewport_Lock

im_get_viewport_lock

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im_get_viewport_lock

Purpose:

This function retrieves the current setting of the viewport lock. When the

display is in 80X25 mode, you can use the viewport in virtual display mode

unless the currently running application program restricts it. The

application program may require the viewport to be locked or unlocked.

Syntax:

With Intrmecd_IO, Intrmecp_IO;

Use Intrmecd_IO, Intrmecp_IO;

procedure im_get_viewport_lock (

viewport_lock_status : OUT IM_CONTROL;

status_code          : OUT System.Word);

IN Parameter:

None.

OUT Parameter:

The viewport_lock_status parameter is one of the following constants:

IM_ENABLE

Viewport is locked

IM_DISABLE

Viewport is unlocked

The status_code is one of the standard status codes defined in Appendix A,

“Status Codes.”

Return Value:

None.

Notes:

The display must be in 80X25 mode (see im_set_display_mode) to use this

function.

This function has no effect on the JANUS 2050.

When the viewport is “locked,” the viewport movement keys do not move

the viewport. The viewport can still move if follow-the-cursor mode is

enabled.

See Also:

im_set_viewport_lock, im_set_display_mode, im_get_display_mode