Attachmate Reflection 2014 .NET API Reference
TypeAhead Property

Gets or sets a value that specifies whether Reflection buffers characters that you type in the terminal window.
Property TypeAhead As Boolean
Dim instance As IIbmTerminal
Dim value As Boolean
instance.TypeAhead = value
value = instance.TypeAhead
bool TypeAhead {get; set;}

Property Value

When this property is True (the default), characters are buffered and sent to the host as soon as possible. When it is False, characters are not buffered, and anything you type while the host is not ready is lost.
Attachmate.Reflection.SecuredSettingException This exception is thrown when you modify a property that was secured via the Permissions Manager or that can only be modified by an Administrator.

This setting is relevant to 5250 and 3270 terminal sessions.

If you are working with an AS/400 host, TypeAhead allows you to keep typing when the keyboard is locked (for example, by a HLLAPI application). Reflection does not buffer characters when input is inhibited. If you are working with a 3270 host, TypeAhead allows you to keep typing after you send data to the host. Without TypeAhead, characters you type are ignored until the host is ready for more data (that is, when the X disappears from the Operator Information Area).

The following 3270 functions are processed immediately and are not buffered, even when TypeAhead is True:

Function Default Keystroke
Alt Cursor Alt-6
Cursor Select Ctrl-F3
Next Window Alt-N
Pan Left Ctrl-Left arrow
Pan Right Ctrl-Right arrow
Reset Esc
Scroll Up Ctrl-Up arrow


Target Platforms: Microsoft Windows 7, Microsoft Windows Vista, Microsoft Windows XP, Microsoft Windows Server 2003 Terminal Services, Microsoft Windows Server 2008 Terminal Services

See Also


IIbmTerminal Interface
IIbmTerminal Members

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